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Kimi Thinking (Preview)

Retired

Earliest reasoning preview model, retired 2025-11-11 per official model list; replacement now kimi-k2.6. Pricing not on current official pages, left null. Context window historically 128K - not re-verifiable on current pages.

Kimi Thinking (Preview) by Moonshot is tracked live in our LLM catalog, with a 131K (131.072-token) context window. It has been retired (shut down 11 Nov 2025); the recommended migration is Kimi K2.6.

Last verified: 13 Aug 2026 · sourced from official provider documentation

Lifecycle warning

This model has been retired. Scheduled shutdown: 11 Nov 2025. Recommended migration: Kimi K2.6.

Read the Kimi Thinking (Preview) migration guide → replacement & cheapest alternatives

Provider
Moonshot
Status
Retired
Input price
—
Output price
—
Cached input
—
Blended price
—
Context window
131.072 tokens (131K)
Max output
—
Modality
text
Open weights
No — API only
Knowledge cutoff
—
Released
—
API string
kimi-thinking-preview

Source: Moonshot official documentation ↗

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FAQ

Kimi Thinking (Preview) — questions & answers

What is the context window of Kimi Thinking (Preview)?

Kimi Thinking (Preview) has a 131.072-token context window (131K).

Is Kimi Thinking (Preview) still available?

Kimi Thinking (Preview) has been retired and is no longer available. Its scheduled shutdown date is 11 Nov 2025. The recommended migration is Kimi K2.6.

Does Kimi Thinking (Preview) support image or vision input?

Our catalog lists Kimi Thinking (Preview)'s modalities as text; image/vision input is not among them.

Can I self-host Kimi Thinking (Preview)?

No — Kimi Thinking (Preview) is proprietary. Its weights are not publicly released, so it is available only through Moonshot's API (or hosted partners), not for self-hosting.

What is the API model string for Kimi Thinking (Preview)?

The API model identifier for Kimi Thinking (Preview) is "kimi-thinking-preview" when calling Moonshot's API.