Plain-English Summary
Anthropic's early-2026 Sonnet model: near-Opus quality for coding, computer use and long-context work at a lower price.
Claude Sonnet 4.6
Anthropic's early-2026 Sonnet model: near-Opus quality for coding, computer use and long-context work at a lower price.
Maker
Anthropic
Claude 4
General LLM
Legacy
Open weights: No
API: Yes
Technical Notes
1M-token context, 128K max output, adaptive thinking.
Best For
Coding, computer use, long-context analysis and agents
Watch Out For
Now a legacy model; newer Claude models are recommended for new work.
Model Specs
- Maker
- Anthropic
- Country
- USA
- Family
- Claude 4
- Type
- General LLM
- Release date
- 2026-02-17
- Date confidence
- Exact
- Status
- Legacy
- Context window
- 1,000,000 tokens
- Max output
- 128,000
- Parameters
- Not disclosed
- Active parameters
- Not disclosed
- Architecture
- Not listed
- Reasoning
- Yes — adaptive
- Tool calling
- Not listed
- Structured output
- Not listed
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- License
- Proprietary
- Inputs
- Text
- Outputs
- Text
- Approx. price
- $3 input / $15 output per 1M tokens
- How to access
- Anthropic API, claude.ai, major clouds
- Model / API ID
- claude-sonnet-4-6
- Knowledge cutoff
- 2025-08
- Fine-tuning
- Not listed
- Completeness
- Not listed
- Verified
- Snapshot date
- Source
- Official source