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Kimi K3 Fast
moonshotai·moonshotai/kimi-k3-fast·GA·Open weights·kimi-k3 series·NEW
Kimi multimodal agent model for visual understanding, coding, and planning
At a glance
Reference price$4.50 / $22.50 per 1M
Cache read $0.45 · Fireworks AI
Lowest paid$3.00 / $15.00
Neuralwatt Gateway · 1.5× spread
Context1,048,576
⚠ Providers report 1,000,000–1,048,576; the table below is authoritative
Output limit131,072
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
⚠ Providers report capability flags inconsistently
Modalities
TextImagePDF
Knowledge cutoff—
Released / updated2026-07-16 / 2026-08-03
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 4 providers4 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Neuralwatt | Gateway | $3.00 | $15.00 | $0.30 | — | 1,048,560 ⚠ | 1,048,560 | |
| Vercel AI Gateway | Cloud | $4.50 | $22.50 | $0.45 | — | 1,000,000 ⚠ | 131,072 | |
| Venice AI kimi-k3-fast-api | Gateway | $4.50 | $22.50 | $0.45 | — | 1,000,000 ⚠ | 131,072 | |
| Fireworks AI | Cloud | $4.50 | $22.50 | $0.45 | — | 1,048,576 | 131,072 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Neuralwatt$1,026.00
2Vercel AI Gateway$1,539.00
3Venice AI$1,539.00
4Fireworks AI$1,539.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = loweffort = higheffort = maxToggle (on / off)effort = mediumbudget_tokens ≥ 1,024
1 / 4 providers expose no reasoning control (reasoning_options: []).
Related models
Kimi K3 TEEsame series$3.00 / $15.00Kimi K3same series$3.00 / $15.00Kimi K3 (Fireworks AI)same series$3.00 / $15.00GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28DeepSeek V4 Flash 0731cheaper alternative$0.479 / $1.44
Price historyone sample accumulated per data sync
Input listOutput listMin blended