Kimi-K2-Thinking vs o3 Pro
API pricing, benchmark indices and specs — updated 19 October 2026.
openai · B · API-only
Input / 1M
$20.00
Output / 1M
$80.00
AA index
21.9
proprietary · 200K context
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | Kimi-K2-Thinking | o3 Pro |
|---|---|---|
| Deployment | Open weights · also via API | API-only (closed weights) |
| Parameters | 1,026.4 B | n/a — API-only |
| Architecture | DeepseekV3ForCausalLM | n/a — API-only |
| Context length | 262,144 | 200,000 |
| Licence | other | Proprietary |
| Commercial use | Unknown | Per API terms |
| Languages | — | n/a — API-only |
| Downloads 30d | 47,623 | n/a — API-only |
| Downloads all time | 2.0 M | n/a — API-only |
| Quantizations on the Hub | SAFETENSORS | n/a — API-only |
| Gated | No | n/a — API-only |
| First seen on the Hub | 2025-11-04 | n/a — API-only |
| API input price / 1M tokens | $0.60 | $20.00 |
| API output price / 1M tokens | $2.50 | $80.00 |
| Est. cost per 1M input + 1M output tokens | $3.10 | $100.00 |
| Cached input / 1M tokens | $0.15 | — |
| AA Intelligence Index | 22 | 21.9 |
| AA Coding Index | — | — |
| AA Agentic Index | — | — |
| Max output tokens | 98,304 | 100,000 |
| API providers | 2 | 1 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
Kimi-K2-Thinking
$3.10
o3 Pro
$100.00
Kimi-K2-Thinking is 32.3× cheaper at list price.
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
Kimi-K2-Thinking · fp16 @ 256K ctx
5,580.9 GB / 24 GB