Claude Sonnet 4.6
AnthropicMULTIMODAL Proprietary
- Provider
- Anthropic
- Modality
- MULTIMODAL
- Parameters
- —
- Context window
- 1,000,000 tokens
- Weights
- Proprietary
- Released
- 17 Feb 2026
Claude Sonnet 4.6 (Feb 2026) is the everyday default — near-flagship coding at ~40% lower cost and ~2x the speed of Opus, with a 1M-token context and tunable thinking.
Best for
- The default workhorse: near-flagship coding cheaply and fast
- Production agents and IDE coding assistants
- Tunable reasoning depth (extended/adaptive thinking)
- Long inputs with 1M context
How it compares — and the India angle
- Delivers ~99% of Opus's coding performance on most real tasks — the smart default before reaching for Opus.
- For budget-conscious Indian developers this is the sweet spot: flagship-class results without Opus pricing.
- Its science score (GPQA ~71) trails Opus — choose Opus when hard math/science is the bottleneck, not coding.
Benchmarks
Representative public scores (approximate, higher is better) for relative comparison. Check the provider for the latest official results.
GPQA Diamond71
SWE-bench Verified80
How to access
API ~$3 / 1M input, ~$15 / 1M output. On the free Claude tier (limited) and Claude Pro.
Access Claude Sonnet 4.6Frequently asked questions
What is Claude Sonnet 4.6?
Claude Sonnet 4.6 is a multimodal AI model developed by Anthropic.
Who made Claude Sonnet 4.6?
Claude Sonnet 4.6 was created by Anthropic.
Is Claude Sonnet 4.6 open source?
No, Claude Sonnet 4.6 is a proprietary model with closed weights.
What is Claude Sonnet 4.6's context window?
Claude Sonnet 4.6 supports a context window of 1,000,000 tokens.