Claude Sonnet 5.5
Anthropic's Sonnet 5 successor targets everyday coding and agents, with stronger coding results at unchanged token rates.
Claude Sonnet 5.5 is available on MiniRouter as . The model page has current pricing, provider routes and API setup.
About the model
- Context: 1M tokens. Vercel lists a 128K output ceiling; input and output share the context window.
- Predecessor: Claude Sonnet 5. Compare task quality and token usage before migrating production workloads.
- API model ID: . Use the full catalog ID in MiniRouter requests.
Anthropic publisher pricing
Publisher rates exclude MiniRouter markup. Current customer rates belong to the model page's live catalog.
| Phase | Input / 1M | Output / 1M | Blended / 1M | Effective | Source |
|---|---|---|---|---|---|
| Publisher list price | $2.00 | $10.00 | $4.00 | Sep 28, 2026 – open-ended | Anthropic ↗ |
Publisher-reported benchmarks
Results from the publisher’s announcement, grouped by unit.
| Benchmark | Reported result | Reported by | As of | Source |
|---|---|---|---|---|
| Terminal-Bench 4.0 | 70.6% | Anthropic | Sep 28, 2026 | Announcement ↗ |
| CursorBench 4.0 | 55.5% | Anthropic | Sep 28, 2026 | Announcement ↗ |
| FrontierCode 1.1 (Main) | 52.1% | Anthropic | Sep 28, 2026 | Announcement ↗ |
These publisher benchmarks do not measure MiniRouter route performance. FrontierCode's best Sonnet 5.5 result uses xhigh rather than max effort.
Native Anthropic migration changes include automatic tool choice, adaptive thinking and append-only conversation history. Review the linked model page before updating an integration.
MiniRouter availability follows its routable catalog; an upstream listing alone does not verify inference or billing.
Independent measurements
Artificial Analysis evaluations of the first-party API.
Not yet evaluated
Artificial Analysis has not published measurements for Claude Sonnet 5.5 as of Sep 21, 2026. Publisher claims above stand alone until they do.
Source: Artificial Analysis ↗, read Sep 21, 2026. Measured on the model's first-party API, not a MiniRouter route.
Keep exploring
Compare published results in the model rankings and coding benchmarks, or read more model releases.
For MiniRouter product updates, visit the changelog.
Sources
- Read at Anthropic ↗
Anthropic Sonnet 5.5 announcement
Published Sep 28, 2026
Editorial reference revised 2026-09-29. Catalog status comes from the generated routing snapshot.