Plain-English Summary
A high-performance Claude model that balances frontier coding and agent capability with production-friendly cost.
Claude Sonnet 5
A high-performance Claude model that balances frontier coding and agent capability with production-friendly cost.
Claude 5
Reasoning LLM
GA
Open weights: No
API: Yes
Technical Notes
Multimodal model with adaptive reasoning, 1M context, 128K output, tools, and structured outputs.
Best For
Coding assistants, enterprise agents, analysis, professional applications
Watch Out For
Less capable than Opus on some extreme tasks; launch pricing is temporary.
Model Specs
- Maker
- Anthropic
- Country
- USA
- Family
- Claude 5
- Type
- Reasoning LLM
- Release date
- 2026-06-30
- Date confidence
- Exact
- Status
- GA
- Context window
- 1,000,000 tokens
- Max output
- 128,000
- Parameters
- Not disclosed
- Active parameters
- Not disclosed
- Architecture
- Proprietary multimodal transformer
- Reasoning
- Yes — adaptive
- Tool calling
- Yes
- Structured output
- Yes
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- License
- Proprietary
- Inputs
- Text, image
- Outputs
- Text
- Approx. price
- $3 input / $15 output per 1M tokens; temporary launch discount
- How to access
- Provider website or API
- Model / API ID
- claude-sonnet-5
- Knowledge cutoff
- 2026-01
- Fine-tuning
- Prompting / RAG
- Completeness
- 90 %
- Verified
- Jul 18, 2026
- Snapshot date
- Jul 18, 2026
- Source
- Official source