Anthropic
Claude 3 Sonnet
LegacyClaude 3 Sonnet balanced cost and capability in the Claude 3 generation—useful for general assistants and document workflows where Opus was unnecessary.
LLM · Release — · See vendor
Updated 1 day ago · Verified Apr 2026 · Score 78
Decision summary
Why teams reach for it, where it fits, and what to watch for — before you dive into specs.
Why teams choose it
- Migration to 3.5 Sonnet is common—run parallel evals before cutover.
- Bedrock model IDs differ from direct API strings.
Best use cases
- Use this when stable internal bots with predictable cost
- Use this when document summarization at scale
Tradeoffs
- Weaker than 3.5 Sonnet on many coding tasks—test before routing traffic.
- Lifecycle status depends on Anthropic announcements.
Technical details
Modalities, benchmarks, and release context.
Modalities
What goes in and what comes out.
- Inputs
- text, image
- Outputs
- text
- Capabilities
- general chat, analysis
Benchmarks snapshot
Structured JSON for reproducible comparisons.
No benchmark data yet — see comparisons for relative performance.
Family lineup
Explore other versions in this family after you have the headline on this model.
Current family lineup
Continue exploring
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Compare with
Related models
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Claude Sonnet 4.5
Catalog entry for this named release; see the provider’s official documentation for modalities, pricing, and context limits.
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Claude Opus 4.6
Catalog entry for this named release; see the provider’s official documentation for modalities, pricing, and context limits.
Anthropic
Claude Opus 4.5
Catalog entry for this named release; see the provider’s official documentation for modalities, pricing, and context limits.
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