Claude Opus 4.6
FrontierAnthropic•Released on 2026-02-05
Anthropic's flagship model with 1M token context (now default), adaptive thinking, and the highest agentic coding scores. Introduced Agent Teams for parallel autonomous coding. Nearly doubled ARC-AGI-2 score over Opus 4.5 (68.8% vs 37.6%).
Voice of the community
sample 2,680“⚠️ BREAKING: Anthropic cuts off Claude subscription usage for OpenClaw and third-party AI agents starting April 4, 2026 at 12pm PT. Users must switch to API billing.”
“Regressions in opus 4.6 extended - thinking less often even with 'always on'. E.g. acts as if thinking wasn't enabled, even for somewhat difficult tasks where it absolutely should think before answering.”
“Nicolas Carlini (67.2k citations on Google Scholar) says Claude is a better security researcher than him. Opus 4.6 found 500+ previously-unknown zero days in open source code.”
Core Specs
Scenario Scores
Pros & Cons
Pros
- +Highest SWE-bench score (80.8%)
- +128K max output (doubled from 4.5)
- +Adaptive thinking with effort levels
- +Agent Teams for parallel coding
- +Best instruction following in complex contexts
Cons
- −2x price of GPT-5.4
- −Response prefilling removed (breaking change)
- −Extended thinking deprecated
- −Rate limits can be hit quickly on entry-level plans
Pricing
Get Started with Claude
💡 Free tier uses Sonnet. Upgrade to Pro for Opus.