Claude Opus 4.6
Released
Claude Opus 4.6 is an AI model released by Anthropic on Thursday, Feb 5 2026, 73 days after Claude Opus 4.5. Benchmark results (shown below) cover BullshitBench v2, ProgramBench, SWE-Bench Verified, Next.js Evals, BrowseComp, Humanity's Last Exam, and 2 more.
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API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $5.00
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.50
- 5 min cache writeA one-off charge for storing text so later requests can reuse it at the cheaper cached rate. This option keeps it for five minutes.
- $6.25
- 1 hr cache writeA one-off charge for storing text so later requests can reuse it at the cheaper cached rate. This option keeps it for an hour, so it costs more than the five-minute one.
- $10.00
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $25.00
Available from
| Amazon Bedrock | — | $5.00 | $25.00 | 1M |
|---|---|---|---|---|
| Azure | global | $5.00 | $25.00 | 1M |
| global | $5.00 | $25.00 | 1M | |
| eu | $5.50 | $27.50 | 1M |
Benchmarks
Coding
ProgramBenchProgram reconstruction — The AI receives a working program and its documentation, then builds a replacement from scratch without the original source code, internet access or decompilation. The score is the percentage of 200 programs that pass every behavioral test. We record each model's best published mini-SWE-agent result, including higher reasoning efforts where available. Partial test-pass rates and almost-solved programs do not count toward this score. Equal scores share a rank here; the official board also uses partial progress to break ties. Higher is better.
0%
via ProgramBench
#5 of 17Best: Claude Opus 5 · 4.5%
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better.
80.8%
#9 of 57Best: Claude Opus 5 · 96%
Next.js EvalsNext.js coding — Vercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better.
58%
#19 of 28Best: Claude Fable 5.1 · 97%
Agentic & tool use
BrowseCompWeb browsing — Can the AI browse the web and track down hard-to-find answers? Higher is better.
83.7%
via BenchLM
#14 of 28Best: GPT-5.6 Sol · 92.2%
OSWorld-VerifiedAgentic computer use — Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better.
72.7%
via BenchLM
#17 of 28Best: Qwen3.8-Max · 86.1%
Reasoning & science
Humanity's Last ExamMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better.
#17 of 42Best: Claude Fable 5.1 · 65%
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
91.3%
#12 of 59Best: GPT-6 Astra · 96%
Robustness
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
87%
#5 of 77Best: Claude Opus 4.8 · 95%
Source: ProgramBench, retrieved 11 September 2026 · Source: BenchLM, retrieved 31 August 2026. Every other score here is the figure the lab published at launch.
Compare Claude Opus 4.6 with
Suggested comparisons
Claude Opus 4.6vsClaude Fable 5.1Claude Opus 4.6vsGPT-6 AstraClaude Opus 4.6vsGemini 3.8 FlashClaude Opus 4.6vsMuse Spark 1.3Claude Opus 4.6vsGrok 4.6Claude Opus 4.6vsDeepSeek-V4.1-FlashClaude Opus 4.6vsMistral Medium 3.5Claude Opus 4.6vsKimi K3Claude Opus 4.6vsGLM-5.3-FlashClaude Opus 4.6vsQwen3.8-Max-0902Claude Opus 4.6vsNemotron 3.5 Lightning
Frequently asked questions
Claude Opus 4.6 was released by Anthropic on Thursday, Feb 5 2026.