Anthropic
Claude Sonnet
Current
5.5
shipped 1mo · 28 Sept 2026
The mid-tier Claude, sized for volume work rather than peak reasoning.
Specification
- Current
- 5.5
- Availability
- Listed; see source
Modalities: text, image, tool use
Claude Sonnet — 6-Axis Capability Radar
HEURISTIC ESTIMATEThese scores are rough estimates from category presets, catalog specs, and keywords in release notes. They are not measured benchmarks or test results. Catalog prices and context windows may refer to a different model variant.
Hover or tap an axis to inspect its estimate
Shipping Cadence & Next Drop Forecast
This is an uncalibrated estimate from limited catalog history. A ratio of 100% means one estimated interval has elapsed; it is not a probability. Next-release dates and versions remain unconfirmed.
90 days
±7d variance44 days
Shipped on 2026-09-284.1 drops/yr
1 observed intervals · limited history2026-12-27
Next version: UnannouncedOptional AI cadence commentary
Summarize the recorded history and its limitations. Future releases remain unconfirmed.
Model Version Capability Delta
AI-synthesized architectural jumps, parameter scaling, and capability shifts across releases.
Ready to analyze Claude Sonnet v5 vs v5.5
Click Synthesize Diff to analyze latent space adjustments, resolution leaps, parameter shifts, and migration caveats via Gemini 3.8 Flash.
Version history
2 releases tracked
5.5
minor28 Sept 2026 · 1moClaude Sonnet 5.5 is listed on OpenRouter and models.dev.
- First listed 2026-09-28 as anthropic/claude-sonnet-5.5, anthropic/claude-sonnet-5.5:batch.
- Platform listing, not a lab announcement. See the source for availability and details.
First listedSpecific source link · unverified ↗5
major30 Jun 2026 · 4moSonnet 5 arrives under the Opus 5 flagship.
- Tracked separately from Opus — different cadence, different tier.
First listedSpecific source link · unverified ↗