$ diff claude-sonnet-5-5 kimi-k2-8-preview
Claude Sonnet 5.5 vs Kimi K2.8 Preview
Values come from Claude Sonnet 5.5 and Kimi K2.8 Preview, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
AnthropicClaude Sonnet 5.5
- context
- 1M
- weights
- closed
- $/M in
- $2
- $/M out
- $10
- context
- 1M
- weights
- closed
- $/M in
- —
- $/M out
- —
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Recency
- Claude Sonnet 5.5 shipped 17 days after Kimi K2.8 Preview (2026-09-28 vs 2026-09-11).
Full spec
| Attribute | Claude Sonnet 5.5 | Kimi K2.8 Preview |
|---|---|---|
| Developer | Anthropic | Moonshot AI |
| Released | 2026-09-28 | 2026-09-11 |
| Context window | 1M tokens | 1,000,000 |
| Pricing | $2/M input · $10/M output · cache reads 10% of base input | not recorded |
| License | proprietary (API-only; no weight release) | proprietary |
| Availability | Claude apps, Claude API as `claude-sonnet-5-5`, Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry, Claude Platform on AWS | Kimi API platform, Kimi Code, Kimi Work |