Anthropic releases Claude Opus 4.6 with 1M context, adaptive thinking and agent teams
Claude Opus 4.6 (`claude-opus-4-6`) was released on February 5, 2026. It brought a 1M-token context window (beta), 'adaptive thinking' that decides when to reason, and 'agent teams' in Claude Code that split large tasks across multiple agents.
Key facts
- Released February 5, 2026; model id claude-opus-4-6; 1M context (beta), 128K output
- Adaptive thinking replaces the manual extended-thinking toggle
- Agent teams: multiple coordinated agents for large tasks; PowerPoint integration
- SWE-bench Verified 80.8% (as the Opus 4.6 comparison figure on Anthropic's Glasswing page)
What happened
Opus 4.6 is better at planning, code review, debugging and working in large codebases. It shipped on claude.ai, the API, Bedrock, Vertex AI and Microsoft Foundry.
Why it matters
It made 1M-token context and adaptive thinking standard features of Anthropic's flagship line.
Changelog
- 2026-09-29: created
Videos (1)
Introducing Claude Opus 4.6
Anthropic · 2026-02-05 · officialDescription by Gemini, which watched the video:
Summary
This video is an official promotional teaser from Anthropic announcing Claude Opus 4.6. It presents a dynamic montage of social media testimonials, creative and technical community projects, and critical reception quotes highlighting Claude's real-world applications before revealing the new model release.
What is shown
- [00:00 - 00:03]: Newspaper clipping graphics showing headlines about Claude and the Claude Code era.
- [00:04 - 00:20]: Rapid montage of social posts and diverse projects powered by Claude, including math tutoring, DIY retro PC building, MRI scans, video creation, knitting patterns ("vibe knit"), school-wide adoption, heating system troubleshooting via "Claude Cowork", an automated website, and a Mars rover drive.
- [00:21 - 00:23]: Multi-screen split grid showing code generation, user interfaces, and community feedback clips.
- [00:24 - 00:28]: Graphic transition modifying "Opus 4.5" into "Introducing Opus 4.6" surrounded by sample prompt cards (e.g., building a drum machine, foam stride impact analysis, custom typography generator).
- [00:29 - 00:36]: Animated headline snippets praising Opus 4.6 ("just gets it", "is a huge leap", "flipped the script", "outperforms other models").
- [00:37 - 00:40]: Title card displaying "Opus 4.6 by ANTHROP\C".
Claims & numbers
- The video displays an on-screen claim stating: "The first AI-planned drive on Mars was powered by Claude" [00:18].
- Text quotes claim Opus 4.6 "outperforms other models" [00:34] and "is redefining what we thought was possible" [00:35].
- No quantitative benchmark metrics, context window figures, or pricing details are provided.
Notable quotes
- "Most people: I use Claude to vibe code. Me: I use Claude to vibe knit." [00:14]
- "The first AI-planned drive on Mars was powered by Claude." [00:18]
- "Opus 4.6 is redefining what we thought was possible." [00:35]
Assessment
This is a stylized official teaser video combining community social media shoutouts, marketing sizzle, and press/user reaction quotes. It serves as an announcement for Opus 4.6 rather than an in-depth live technical walkthrough or benchmark demonstration.
Described by gemini-3.8-flash on 2026-09-29 from the video's audio and frames.
Related events
- Anthropic releases Claude Sonnet 4.6 ★★
- Anthropic releases Claude Opus 4.7, admits it trails the unreleased Mythos Preview ★★★
- Donald Knuth's 'Claude's Cycles': Claude Opus 4.6 solves an open Hamiltonian-cycle problem ('Shock! Shock!') ★★★★
Sources (4)
- pressTechCrunch: Opus 4.6 with new agent teams
- pressCNBC: Opus 4.6 and the 'vibe working' era
- paperClaude Opus 4.6 System Card (PDF)
- videoIntroducing Claude Opus 4.6 (official video)
id: 2026-02-05-claude-opus-4-6 · updated 2026-09-29 · open in the interactive timeline