Plan a relaxed Saturday using these options: a park open 9am-6pm, a museum open 10am-5pm, and a cafe open 8am-8pm. Start at 10am, include a lunch break, and allow 30 minutes between stops. Return a timetable without inventing prices or opening hours.
Claude Opus 4 6 API: Online text generation, tutorials and integration guide
Connect to Claude Opus 4 6 in one click on RequestBeam. One API key connects AI and multiple data services, so you can focus on your business and explore new ideas.
Claude Opus 4 6 API pricing and billing
0-1M input tokens
Official price
- Input
-
$5.0000/M - Output
-
$25.0000/M - Cache input
-
$0.5000/M - Cache write (5m)
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$6.2500/M - Cache write (1h)
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$10.0000/M
Our price Save 45%
- Input
- $2.7500 /M
- Output
- $13.7500 /M
- Cache input
- $0.2750 /M
- Cache write (5m)
- $3.4375 /M
- Cache write (1h)
- $5.5000 /M
Claude Opus 4 6 online chat tool
Model settings
It includes completed, reusable turns from this conversation in your next request, so you can ask follow-up questions without repeating the context.
What happens when it is off?Only your new message and any system prompt are sent. Existing messages stay visible; turning memory back on includes eligible earlier turns again.
Is this long-term memory?No. This is conversation context, not memory across separate conversations. Failed, stopped, truncated, or non-reusable replies are excluded. More history can use more input tokens and increase cost.
Advanced parameters
Conversation

How can I help you today?
No response data yet Claude Opus 4 6 prompt examples
Draft a polite customer email for this situation: an order will arrive two days late, the revised delivery date is October 15, and tracking will be sent tomorrow. Apologize without inventing compensation. Include a subject line and keep the email under 120 words.
Turn these meeting notes into an action list: Maya will revise the proposal by Friday; Leo will confirm the venue next Monday; the budget needs approval, with no owner assigned. Use columns for task, owner, deadline, and open questions. Mark missing details as unknown.
What is Claude Opus 4 6?
Claude Opus 4 6 model focus and core capabilities
Claude Opus 4 6 is an Anthropic model for demanding coding, sustained multi-step work, and analysis across substantial material. It develops the Opus 4.5 line with more careful planning and improved code review and debugging, making it a candidate for tasks that require connecting requirements, implementation, and supporting documents.
Claude Opus 4 6 online tools and API on RequestBeam
RequestBeam provides an online text Playground, shared Chat Completions, and Claude Messages for this model. Test a real task here before integrating it into your application. The Playground does not provide repository access, file uploads, web search, or an execution environment; model capabilities and native API features do not establish that those facilities are available in this tool.
Claude Opus 4 6 capabilities and domain strengths
Opus 4 6 is useful to evaluate when a task spans several related decisions rather than one isolated answer. Provide the governing requirements and source material, then ask it to separate findings, assumptions, and the next checks.
Cross-file debugging and code review
For a failure that crosses a caller, service, and data layer, provide the relevant code and logs together. Ask for the suspected cause, evidence from each module, and a minimal patch instead of a rewrite based only on the final error.
Review proposed changes against existing contracts and run regression tests locally. A convincing explanation can still miss concurrency, permissions, or side effects; the Playground cannot inspect missing files or execute the patch.
Long-context synthesis with source attribution
Long-context work is a model strength, but a larger input is useful only when relationships remain visible. Label documents and ask for shared facts, contradictions, and unresolved questions instead of merging every note into one smooth narrative.
For project records, keep proposals distinct from approvals and estimates distinct from commitments. Select relevant passages and check quotations; native context capacity is not a guarantee of the input allowance or perfect recall on your RequestBeam route.
Adaptive thinking for complex planning
Opus 4 6 supports adaptive thinking in its native API. It is relevant when a problem has dependencies or uncertain branches, such as choosing a migration order while preserving compatibility and rollback options.
On RequestBeam, advanced thinking configuration depends on the documented interface and upstream support. Do not copy settings between Chat and Messages without checking their formats; allow space for the final answer and compare whether extra reasoning actually reduces errors.
Professional analysis and document work
Use supplied business or technical material to draft a decision brief, compare options, or explain an analysis. Ask for the facts supporting each recommendation and the information that would change it.
Check calculations, quotations, and the scope of conclusions against the original material. For consequential financial or legal decisions, use qualified review rather than treating generated analysis as an approval or professional determination.
Claude Opus 4 6 benchmarks and performance
Performance depends on the task, prompt, thinking configuration, and available tools. Benchmark results do not establish RequestBeam latency, availability, or the percentage of your issues that will be solved. Evaluate the model using checkable work from your own application.
Assess coding with runnable acceptance tests
Use known defects with their surrounding files and expected behavior. Score whether the proposed patch fixes the defect, preserves working paths, and identifies missing evidence; explanation length alone is not a quality metric.
Agentic coding tests may include terminal tools and repeated execution feedback. A text-only answer lacks that loop, so compare patch suggestions separately from a full agent that can run and revise them.
Assess synthesis with contradictions and buried details
Build a document sample containing known disagreements, repeated names, and an important condition late in the text. Check missed conflicts, wrong attribution, and invented decisions, not just whether the summary sounds coherent.
Repeat with different input lengths and keep source labels stable. Retrieval of a detail and correct reasoning about that detail are separate checks; one successful sample does not prove reliable use of every long context.
Measure quality, latency, and actual usage together
Keep task requirements and output allowances comparable, then record useful-answer rate, rework, first output time, total duration, and token usage. Distinguish time spent reasoning from time spent producing the final text.
Start with a small representative workload before increasing history, context, or concurrency. A longer reasoning path can cost more without helping a simple extraction task; select settings based on observed results rather than a universal highest-effort rule.
Claude Opus 4 6 compared with Claude and GPT models
Compare models on the work you need completed. The table describes task candidates and validation methods, not a ranked benchmark or a controlled RequestBeam speed comparison.
| Task | Claude Opus 4 6 approach | Alternative to test | Validation |
|---|---|---|---|
| Cross-file repair | Trace causes and propose a bounded patch | Claude Opus 4 5 | Run defect and regression tests |
| Requirements and workflow review | Connect dependencies and unresolved rules | Claude Sonnet 4 6 | Count omissions and invented rules |
| Multi-source analysis | Preserve attribution and contradictions | GPT 5.4 | Check claims against labeled material |
| Short extraction | Return fields with explicit unknowns | DeepSeek V4 Flash | Validate fields and compare actual usage |
When to prioritize testing Claude Opus 4 6
Prioritize it for a difficult debugging investigation or a decision record built from conflicting documents. These tasks benefit from a plan that links evidence to each change while leaving unanswered questions visible.
Use Opus 4 5 as a same-family baseline and Sonnet 4 6 as another candidate. Count correct findings and unnecessary changes on the same samples; a newer version or an Opus label is not proof of a better result in your workflow.
Choose models by task on RequestBeam
Include GPT 5.4 for analysis and another catalog option such as DeepSeek V4 Flash for extraction. Define the output contract first so differences in phrasing do not hide differences in correctness.
Reuse shared Chat Completions where suitable, but keep native protocol integrations separate. Claude Messages and GPT Responses have different request and response shapes; compare current account prices and actual usage without assuming speed or cost from a model name.
Why use Claude Opus 4 6 through RequestBeam?
Usage-based billing and model cost optimization
Reliable service at prices lower than official rates. Top up on demand and use what you pay for.
Unified AI models and data APIs, with multi-model access in one place
One API key connects multiple AI models and data services, reducing integration costs and letting you switch with one click. Business applications need both AI and data.
Call logs and application access controls, with clarity on every call
Every API call is recorded in your dashboard. Create separate API keys for different applications.
Model capabilities without compromise
We do not water down our models. We cannot offer you the cheapest, but we are committed to offering you the best.
How to use Claude Opus 4 6 on RequestBeam
After creating an API key in the console, follow the documentation to get started with Claude Opus 4 6.
Prepare your account and test online
Sign in, confirm your balance, and create an API key.
Try it in the Playground
Explore the model's capabilities in the Playground to find the best way to use it.
Integrate Claude Opus 4 6 into your business
Follow our developer documentation to integrate Claude Opus 4 6 into your business.
Future model upgrades
When a new model is released, simply replace the model name with the new one to upgrade.
Claude Opus 4 6 API FAQ
Is Claude Opus 4.6 the same API model as Opus 4.5?
No. The API model name for Claude Opus 4.6 is claude-opus-4-6; the API model name for Claude Opus 4.5 is claude-opus-4-5. They are different models, so do not mix up their model parameters.
Why is thinking empty or the answer incomplete?
Native Opus 4.6 has thinking off by default and supports adaptive thinking when enabled. Thinking may be empty when it is off or the model decides it is unnecessary. For an incomplete answer, check the completion state and output allowance, leaving enough room for thinking and final text.
How should I troubleshoot authentication, balance, or access errors?
Follow the API error documentation to diagnose the issue.
Can I use OpenAI Responses for Claude Opus 4.6?
OpenAI Responses is not supported. Claude has its own Claude Messages format; see the documentation for details.
Can I force a tool call or edit a native Messages conversation?
Native Opus 4.6 supports tool selection, but forced tool_choice types any or tool are not supported with manual extended thinking enabled. This restriction does not apply to every configuration. Take care when replaying preserved thinking after editing earlier messages. Keep native assistant content blocks and their signatures intact during tool continuations.
Is conversation memory permanent?
No. The API does not automatically retain conversation context for subsequent requests. Manage the history yourself and include the required context in each request. Long-term memory must be implemented by your application.
Related text APIs
Claude Opus 4 6 API specification and requests
Claude Opus 4 6 API quickstart
claude-opus-4-6Chat CompletionsPOST /v1/chat-completions
curl -X POST "https://api.requestbeam.com/v1/chat-completions" \
-H "Authorization: Bearer <API_KEY>" \
-H "Content-Type: application/json" \
-d '{"model":"claude-opus-4-6","messages":[{"role":"user","content":"Hello, introduce yourself in one sentence."}],"stream":false}'MessagesPOST /anthropic/v1/messages
Messages requires max_tokens. The allowance in this example is editable, not an upstream default or a model limit. Thinking may consume it before any answer text; adjust it for your task and check output costs.
curl -X POST "https://api.requestbeam.com/anthropic/v1/messages" \
-H "Authorization: Bearer <API_KEY>" \
-H "Content-Type: application/json" \
-H 'anthropic-version: 2023-06-01' \
-d '{"model":"claude-opus-4-6","max_tokens":4096,"messages":[{"role":"user","content":"Hello, introduce yourself in one sentence."}],"stream":false}'Family and protocol reference
Claude Messages
Full API documentationNative Claude Messages-compatible API. This endpoint uses Anthropic Messages request and response shapes, including tool calls and Anthropic SSE events.
https://api.requestbeam.com/anthropic/v1/messagesNative Claude Messages-compatible API. This endpoint uses Anthropic Messages request and response shapes, including tool calls and Anthropic SSE events.
POST https://api.requestbeam.com/anthropic/v1/messagesAuthentication
All requests require a RequestBeam API Key. Anthropic SDKs, Claude Code, and compatible clients usually use x-api-key; plain HTTP clients may also use Bearer Token authentication.
x-api-key: YOUR_REQUESTBEAM_API_KEY
anthropic-version: 2023-06-01Authorization: Bearer YOUR_REQUESTBEAM_API_KEY
anthropic-version: 2023-06-01Body
modelstringrequiredDefault: claude-sonnet-4-6Supported Claude model IDs.
claude-fable-5claude-fable-5-1claude-haiku-4-5claude-opus-4-5claude-opus-4-6claude-opus-4-7claude-opus-4-8claude-opus-5claude-opus-5-5claude-sonnet-4-5claude-sonnet-4-6claude-sonnet-5
Use GET https://api.requestbeam.com/v1/models for the models currently available to your API Key.
max_tokensintegerrequiredMaximum number of output tokens, as a positive safe integer. This budget includes both thinking and final text output tokens. Missing, zero, negative, fractional, string, or unsafe-integer values return HTTP 400 with invalid_request_error before generation or billing. The model may impose a lower maximum.
For models that produce thinking, a small budget such as 128 may yield only thinking blocks before ending with stop_reason: "max_tokens", without text output. Set an explicit budget for the task and the selected model, allowing room for thinking and the final answer. The values in the examples are editable allowances, not upstream defaults or model limits; larger allowances may increase output usage and cost.
messagesobject[]requiredConversation messages. Each message contains role and content.
role supports user and assistant. content may be a string or an array of content blocks.
systemstring | object[]System prompt. Anthropic Messages uses a top-level system field instead of a system role in messages.
streambooleanDefault: falseWhether to return Anthropic SSE events.
temperaturenumberSampling temperature. Accepted values and effects vary by the selected model.
top_pnumberNucleus sampling parameter. Acceptance does not guarantee that it changes generation behavior.
top_kintegerTop-k sampling parameter. Support depends on the selected model.
stop_sequencesstring[]Stop sequences.
Requests with nonempty stop sequences avoid model services known not to support them; if no compatible service is available, the request returns 400 before generation or billing.
toolsobject[]Anthropic tool definitions. Function tools usually include name, description, and input_schema.
tool_choiceobjectTool selection policy, such as { "type": "auto" } or { "type": "tool", "name": "..." }.
thinkingobjectNative Anthropic thinking configuration, subject to the selected model and provider's support. Claude 4.5 uses { "type": "enabled", "budget_tokens": 1024 }; Claude Sonnet/Opus 4.6 also support adaptive thinking. Do not apply a manual budget to every model version. In tool continuations, return the complete ordered assistant content, including thinking, signature, redacted_thinking and tool_use, unchanged. Keep the thinking configuration and required anthropic-beta headers consistent through the tool round trip. For SSE, concatenate signature_delta.signature fragments for the same content block; an empty thinking summary does not mean its signature can be discarded. A provider account access rejection is an upstream failure, not evidence of an invalid signature. Recognized Bedrock account access rejections return HTTP 502 with api_error; ordinary client validation errors retain HTTP 400. Acceptance still requires an enabled upstream account.
metadataobjectRequest metadata.
Prompt Caching
Add cache_control: { "type": "ephemeral" } to a system or message content block. Cache usage may include cache_creation_input_tokens, cache_read_input_tokens, and supported 5-minute or 1-hour creation buckets. A 1-hour TTL also requires the corresponding anthropic-beta header.
Request Examples
Non-Streaming
{
"model": "claude-sonnet-4-6",
"max_tokens": 1024,
"messages": [
{
"role": "user",
"content": "Hello, introduce yourself in one sentence."
}
],
"stream": false
}Streaming
{
"model": "claude-haiku-4-5",
"max_tokens": 1024,
"messages": [
{
"role": "user",
"content": "Reply exactly OK."
}
],
"stream": true
}Response
Non-streaming responses keep the Anthropic Message shape.
idstringResponse ID, such as msg_....
typestringObject type, usually message.
rolestringUsually assistant.
modelstringActual Claude model used.
contentobject[]Native output content blocks, including text, tool_use, and thinking when used.
stop_reasonstringStop reason, such as end_turn, max_tokens, stop_sequence, or tool_use.
usageobjectToken usage, including input_tokens and output_tokens. Cache token fields are included when present.
Success Example
{
"id": "msg_01...",
"type": "message",
"role": "assistant",
"model": "claude-sonnet-4-6",
"content": [
{
"type": "text",
"text": "Hello, I am Claude and can help with writing, coding, and analysis tasks."
}
],
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 18,
"output_tokens": 24
}
}Streaming Response
When stream: true, the endpoint returns Anthropic SSE events. Common events include:
message_startcontent_block_startcontent_block_deltacontent_block_stoppingmessage_deltamessage_stop
Error Response
See Error Codes and Troubleshooting for the full code reference, protocol differences, and diagnostic steps.
Error responses use the Anthropic-style shape:
{
"type": "error",
"error": {
"type": "authentication_error",
"message": "Invalid credentials or API key has expired."
}
}