Anthropic Claude Opus 4.6 and Sonnet 4.6

#Claude Opus 4.6

Opus 4.6 improvement over Opus 4.5:

• Agent Team: it can run and coordinate sub-agents, and you can access them individually now.
• 1M tokens context
• Compaction + Adaptive Thinking + Effort: it's more frugal in how uses tokens
• Max thinking: if you have cash to burn it runs 6x faster but it costs 2.5 time more. We suspect it's using Cerebras or some other solution under the hood.

#Claude Sonnet 4.6

Anthropic has also released Claude Sonnet 4.6, the latest update to its mid-tier model family, which is now the default model across both free and paid tiers on claude.ai and Claude Cowork. Sonnet 4.6 delivers stronger reasoning, better coding performance, improved computer use, and long-context reasoning, building on the 4.5 lineage. Key points of Sonnet 4.6:

• 1M token context
• Improved coding, reasoning, agent planning, knowledge work, and design.

Sonnet 4.6 narrows the gap between mid-tier and flagship performance, bringing many higher-end capabilities to broader users while retaining a cost-effective position relative to Opus offerings.

The benchmarks are solid, but we take them with a grain of salt, since models are overfitting for them:

Sources: Claude Opus 4.6, tweet 1, tweet 2, tweet 3