$ diff kimi-k2-8-preview claude-fable-5-1
Kimi K2.8 Preview vs Claude Fable 5.1
Values come from Kimi K2.8 Preview and Claude Fable 5.1, 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.
Moonshot AIKimi K2.8 Preview
- context
- 1M
- weights
- closed
- $/M in
- —
- $/M out
- —
- context
- 1M
- weights
- closed
- $/M in
- $10
- $/M out
- $50
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Recency
- Kimi K2.8 Preview shipped 10 days after Claude Fable 5.1 (2026-09-11 vs 2026-09-01).
Full spec
| Attribute | Kimi K2.8 Preview | Claude Fable 5.1 |
|---|---|---|
| Developer | Moonshot AI | Anthropic |
| Released | 2026-09-11 | 2026-09-01 |
| Context window | 1,000,000 | 1M tokens |
| Pricing | not recorded | $10/M input · $50/M output · cache reads $0.25/M |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | Kimi API platform, Kimi Code, Kimi Work | Claude API as `claude-fable-5-1`; plan-tier access is disputed — see `## Conflicting Reports` |