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Favicon for anthropic

Anthropic: Claude Opus 4.6

anthropic/claude-opus-4.6

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Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective for large codebases, complex refactors, and multi-step debugging that unfolds over time. The model shows deeper contextual understanding, stronger problem decomposition, and greater reliability on hard engineering tasks than prior generations.

Beyond coding, Opus 4.6 excels at sustained knowledge work. It produces near-production-ready documents, plans, and analyses in a single pass, and maintains coherence across very long outputs and extended sessions. This makes it a strong default for tasks that require persistence, judgment, and follow-through, such as technical design, migration planning, and end-to-end project execution.

For users upgrading from earlier Opus versions, see our official migration guide hereOpens in new tab

Modalities
In / Out Price
$5 / $25per 1M
Context
1.0M
Released
Feb 4, 2026
Compare
ProvidersPricingPerformanceUptimeBenchmarksAppsActivityDocumentationFAQExplore

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Anthropic: Claude Opus 4.6 (Artificial Analysis, Design Arena and Vals AI)
SourceBenchmarkScore
Artificial AnalysisClaude Opus 4.6 (Max) GPQA Diamond89.6%
Artificial AnalysisClaude Opus 4.6 (Max) HLE39.9%
Artificial AnalysisClaude Opus 4.6 (Max) IFBench53.1%
Artificial AnalysisClaude Opus 4.6 (Max) τ²-Bench Telecom92.1%
Artificial AnalysisClaude Opus 4.6 (Max) AA-LCR78.0%
Artificial AnalysisClaude Opus 4.6 (Max) CritPt12.6%
Artificial AnalysisClaude Opus 4.6 (Max) Terminal-Bench Hard46.2%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) GPQA Diamond84.0%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) HLE19.1%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) IFBench44.6%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) τ²-Bench Telecom84.8%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) AA-LCR67.0%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) CritPt2.8%
Artificial AnalysisClaude Opus 4.6 (Non-reasoning, High) Terminal-Bench Hard48.5%
Design ArenaClaude Opus 4.6 Agents Arena Agenticgamedev Elo1164
Design ArenaClaude Opus 4.6 Agents Arena Androidnative Elo1192
Design ArenaClaude Opus 4.6 Agents Arena Blender3d Elo1047
Design ArenaClaude Opus 4.6 Agents Arena Full Stack Elo1220
Design ArenaClaude Opus 4.6 Agents Arena Mobile Apps Elo1207
Design ArenaClaude Opus 4.6 Agents Arena Spreadsheet Elo1248
Design ArenaClaude Opus 4.6 Agents Arena Webapps Elo1206
Design ArenaClaude Opus 4.6 Models Arena 3D Elo1271
Design ArenaClaude Opus 4.6 Models Arena Asciiart Elo1250
Design ArenaClaude Opus 4.6 Models Arena Code Categories Elo1287
Design ArenaClaude Opus 4.6 Models Arena Data Visualization Elo1279
Design ArenaClaude Opus 4.6 Models Arena Game Development Elo1272
Design ArenaClaude Opus 4.6 Models Arena SVG Elo1212
Design ArenaClaude Opus 4.6 Models Arena UI Component Elo1278
Design ArenaClaude Opus 4.6 Models Arena Website Elo1290
Vals AIClaude Opus 4.6 (Thinking) AIME95.6%
Vals AIClaude Opus 4.6 (Thinking) CaseLaw v262.1%
Vals AIClaude Opus 4.6 (Thinking) CorpFin v267.0%
Vals AIClaude Opus 4.6 (Thinking) Finance Agent v1.160.0%
Vals AIClaude Opus 4.6 (Thinking) GPQA Diamond89.6%
Vals AIClaude Opus 4.6 (Thinking) LiveCodeBench84.7%
Vals AIClaude Opus 4.6 (Thinking) LegalBench85.3%
Vals AIClaude Opus 4.6 (Thinking) MedCode49.1%
Vals AIClaude Opus 4.6 (Thinking) MedQA95.4%
Vals AIClaude Opus 4.6 (Thinking) MedScribe86.1%
Vals AIClaude Opus 4.6 (Thinking) MMLU Pro89.1%
Vals AIClaude Opus 4.6 (Thinking) MMMU Pro83.9%
Vals AIClaude Opus 4.6 (Thinking) MortgageTax68.5%
Vals AIClaude Opus 4.6 (Thinking) ProofBench v150.0%
Vals AIClaude Opus 4.6 (Thinking) SAGE v151.6%
Vals AIClaude Opus 4.6 (Thinking) SWE-bench78.2%
Vals AIClaude Opus 4.6 (Thinking) TaxEval v276.0%
Vals AIClaude Opus 4.6 (Thinking) Terminal-Bench 2.058.4%
Vals AIClaude Opus 4.6 (Thinking) Vals Index66.0%
Vals AIClaude Opus 4.6 (Thinking) Vals Multimodal Index65.2%
Vals AIClaude Opus 4.6 (Thinking) Vibe Code Bench v1.153.5%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Available through EU in-region routing

Anthropic: Claude Opus 4.6 is available through EU in-region routing. Requests sent to eu.openrouter.ai are decrypted in the EU and routed only to shared provider endpoints in Europe (the EU/EEA, the UK, and Switzerland).

Providers in Europe
Google Vertex
Prices in Europe
  • Google Vertex: $5.50/M tokens input, $27.50/M tokens output
Base URL
https://eu.openrouter.ai/api/v1
Plan
Requires Business or Enterprise. Self-serve on Business: no contract, no monthly minimum. OpenRouter Business for EU in-region routing

Fails closed: if no shared provider endpoint in Europe is available, the request errors instead of leaving the region. Requests served by your own BYOK key go to your deployment’s region, which you control. In-region routing docs

Documentation

Guides, cookbooks, blog posts, and tools for building with Anthropic: Claude Opus 4.6 on OpenRouter.

  • Claude 4.6 Migration GuideCookbook

Explore more models

AI Models with Vision: Multimodal LLMs for Image UnderstandingCollectionAI Model RankingsRanking
Latency / throughput
$5.00$25.00$0.501.21s36 tps
100.00%
$5.00$25.00$0.503.13s29 tps
75.00%
$5.00$25.00$0.502.01s40 tps
100.00%
$5.00$25.00$0.502.02s33 tps
99.92%
$5.00$25.00$0.501.68s32 tps
99.94%
Not used in Standard routing:Why these endpoints are not used
$5.50$27.50$0.551.42s47 tps
100.00%
Throughput
47tok/s

P50, best across providers

Latency
1.21s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-BenchAnthropic87.5%77.0%auto-routing87.7%76.1%Google Vertex (EU)87.0%76.7%Azure87.4%75.6%Claude Platform on AWS87.1%76.0%Google Vertex87.2%75.1%
+1 more providers
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.90%

Availability over the last 3 days

Last 72 hours
Availability 99.90%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.94%
Without Routing
98.81%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

1.
Favicon for https://claude.ai/apple-touch-icon.png
Claude Code
Claude Code is Anthropic's agentic coding tool that reads your entire codebase, plans and executes changes across files, runs tests, and iterates on failures, all from natural language prompts.
53.9Btokens
2.
Favicon for https://openclaw.ai/
OpenClaw
OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.
51.6Btokens
3.
Favicon for https://nousresearch.com
Hermes Agent
Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.
27.1Btokens
4.
Favicon for https://sillytavern.app/
SillyTavern
SillyTavern is the LLM frontend for power users, a chat interface that connects to any model and gives deep control through character creation, roleplay, and prompt customization.
9.85Btokens
5.
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cyberstrike
new
8Btokens

Frequently asked questions

Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective for large codebases, complex refactors, and multi-step debugging that unfolds over time.

The Claude Opus 4.6 documentation on OpenRouter includes the Claude 4.6 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

Claude Opus 4.6 costs $5.00/M input tokens and $25.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens, Cache Write at $6.25/M tokens, Cache Write (1h) at $10.00/M tokens, and Web Search at $10.00/1K calls.

Claude Opus 4.6 has a 1,000,000 token context window. It supports up to 128,000 completion tokens.

Yes. Claude Opus 4.6 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Claude Opus 4.6 accepts text, images, and files such as PDFs as input and returns text.

Claude Opus 4.6 is served by 5 providers on OpenRouter: Claude Platform on AWS, Azure, Google Vertex, Amazon Bedrock, and Anthropic. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Claude Opus 4.6 was released on February 4, 2026.