September 2025 Kimi K2 instruction update with a 256K context and improved agentic coding
Specification
most-agreed values
Context
262K
Max output
262K
Released
2025-09-05
Knowledge cutoff
2025-06
Retires
—
Open weights
yes
Input
text
Output
text
Price
US dollars per million tokens · most-agreed
Input
$0.6285
Output
$2.5146
Cache read
$0.50
Quality
6 benchmarks · 3 sources
Composite
71st
percentile of 344 scored models
Rank
101 / 344
±0.06 sd
Evidence
6 × 3
3 or more benchmarks, from 2 or more sources
Effort range
—
one configuration only
coding55th2/3 bench
reasoning86th1/4 bench
math64th3/7 bench
Every score
one row per source and configuration — nothing averaged away
| Benchmark | Score | Configuration | Source | Run |
|---|---|---|---|---|
| GPQA diamond | 84.2 ±2.1 | default | Epoch AI | 2025-11-11 |
| OTIS Mock AIME 2024-2025 | 83.1 ±4.8 | default | Epoch AI | 2025-11-13 |
| Aider polyglot | 59.1 | default · aider diff | Aider | 2025-07-17 |
| FrontierMath-v1 | 27.1 ±2.4 | default · 3 runs | Epoch AI | 2025-12-05 |
| SWE-Bench verified | 59.4 | default · OpenHands · 5 runs | SWE-bench | — |
| FrontierMath-Tier-4-2025-07-01 | 0.0 ±0.0 | default · 2 runs | Epoch AI | 2025-12-08 |
The leading figure for a benchmark is the median across its configurations, so one heroic high-effort run cannot set the number.
Available from 16 hosts
| Host | In $/M | Out $/M | Cache rd | Cache wr | Context | Output | Retires |
|---|---|---|---|---|---|---|---|
| opencode | $0.40 | $2.50 | $0.40 | — | 262K | 262K | — |
| vercel_ai_gateway · vercel-ai-gateway | $0.55 | $2.20 | — | — | 131K | 16K | — |
| helicone | $0.57 $0.50 | $2.30 $2.00 | $0.40 | — | 131K 262K | 16K | — |
| kilo · moonshotai | $0.57 $0.60 | $2.30 $2.50 | — | — | 131K 262K | 98K | — |
| llmgateway | $0.57 | $2.30 | $0.50 | — | 256K | 16K | — |
| llmgateway-providers | $0.57 | $2.30 | — | — | 131K | 131K | — |
| openrouter · moonshotai | $0.57 $0.60 | $2.30 $2.50 | — | — | 131K 262K | 98K | — |
| vercel · moonshotai | $0.57 | $2.30 | — | — | 131K | 131K | — |
| qiniu-ai | $0.5797 | $2.3188 | — | — | 128K | 128K | — |
| jiekou · moonshotai | $0.60 | $2.50 | — | — | 262K | 100K | — |
| novita | $0.60 | $2.50 | — | — | 262K | 100K | — |
| novita-ai · moonshotai | $0.60 | $2.50 | — | — | 262K | 98K | — |
| prime · moonshotai | $0.60 | $2.50 | — | — | 262K | 98K | — |
| aimlapi · moonshotai | $0.6031 $1.058 | $2.4334 $3.174 | — | — | 131K 262K | 98K | — |
| 302ai | $0.6285 | $2.5146 | — | — | 262K | 262K | — |
| qiniu-ai · moonshotai | — | — | — | — | 256K | 100K | — |
Price history
append-only observations · a listing writes a row only when its price moves
| Date | Host | Field | $/M |
|---|---|---|---|
| 2026-09-02 | 302ai | Input | $0.632 |
| 2026-10-22 | 302ai | Input | $0.6285 |
| 2026-09-02 | helicone | Input | $0.57 |
| 2026-09-04 | helicone | Input | $0.50 |
| 2026-09-24 | helicone | Input | $0.57 |
| 2026-10-19 | helicone | Input | $0.50 |
| 2026-10-20 | helicone | Input | $0.57 |
| 2026-10-23 | helicone | Input | $0.50 |
| 2026-10-25 | helicone | Input | $0.57 |
| 2026-10-26 | helicone | Input | $0.50 |
| 2026-10-27 | helicone | Input | $0.57 |
| 2026-10-29 | helicone | Input | $0.50 |
| 2026-10-31 | helicone | Input | $0.57 |
| 2026-09-02 | kilo · moonshotai | Input | $0.57 |
| 2026-09-04 | kilo · moonshotai | Input | $0.60 |
| 2026-10-19 | kilo · moonshotai | Input | $0.57 |
| 2026-10-20 | kilo · moonshotai | Input | $0.60 |
| 2026-10-21 | kilo · moonshotai | Input | $0.57 |
| 2026-10-23 | kilo · moonshotai | Input | $0.60 |
| 2026-10-27 | kilo · moonshotai | Input | $0.57 |
| 2026-10-28 | kilo · moonshotai | Input | $0.60 |
| 2026-10-29 | kilo · moonshotai | Input | $0.57 |
| 2026-10-31 | kilo · moonshotai | Input | $0.60 |
| 2026-11-01 | kilo · moonshotai | Input | $0.57 |
| 2026-09-02 | openrouter · moonshotai | Input | $0.57 |
| 2026-09-04 | openrouter · moonshotai | Input | $0.60 |
| 2026-10-19 | openrouter · moonshotai | Input | $0.57 |
| 2026-10-20 | openrouter · moonshotai | Input | $0.60 |
| 2026-10-21 | openrouter · moonshotai | Input | $0.57 |
| 2026-10-23 | openrouter · moonshotai | Input | $0.60 |
| 2026-10-27 | openrouter · moonshotai | Input | $0.57 |
| 2026-10-28 | openrouter · moonshotai | Input | $0.60 |
| 2026-10-29 | openrouter · moonshotai | Input | $0.57 |
| 2026-10-31 | openrouter · moonshotai | Input | $0.60 |
| 2026-11-01 | openrouter · moonshotai | Input | $0.57 |
| 2026-09-02 | 302ai | Output | $2.53 |
| 2026-10-22 | 302ai | Output | $2.5146 |
| 2026-09-02 | helicone | Output | $2.30 |
| 2026-09-04 | helicone | Output | $2.00 |
| 2026-09-24 | helicone | Output | $2.30 |
| 2026-10-19 | helicone | Output | $2.00 |
| 2026-10-20 | helicone | Output | $2.30 |
| 2026-10-23 | helicone | Output | $2.00 |
| 2026-10-25 | helicone | Output | $2.30 |
| 2026-10-26 | helicone | Output | $2.00 |
| 2026-10-27 | helicone | Output | $2.30 |
| 2026-10-29 | helicone | Output | $2.00 |
| 2026-10-31 | helicone | Output | $2.30 |
| 2026-09-02 | kilo · moonshotai | Output | $2.30 |
| 2026-09-04 | kilo · moonshotai | Output | $2.50 |
| 2026-10-19 | kilo · moonshotai | Output | $2.30 |
| 2026-10-20 | kilo · moonshotai | Output | $2.50 |
| 2026-10-21 | kilo · moonshotai | Output | $2.30 |
| 2026-10-23 | kilo · moonshotai | Output | $2.50 |
| 2026-10-27 | kilo · moonshotai | Output | $2.30 |
| 2026-10-28 | kilo · moonshotai | Output | $2.50 |
| 2026-10-29 | kilo · moonshotai | Output | $2.30 |
| 2026-10-31 | kilo · moonshotai | Output | $2.50 |
| 2026-11-01 | kilo · moonshotai | Output | $2.30 |
| 2026-09-02 | openrouter · moonshotai | Output | $2.30 |
| 2026-09-04 | openrouter · moonshotai | Output | $2.50 |
| 2026-10-19 | openrouter · moonshotai | Output | $2.30 |
| 2026-10-20 | openrouter · moonshotai | Output | $2.50 |
| 2026-10-21 | openrouter · moonshotai | Output | $2.30 |
| 2026-10-23 | openrouter · moonshotai | Output | $2.50 |
| 2026-10-27 | openrouter · moonshotai | Output | $2.30 |
| 2026-10-28 | openrouter · moonshotai | Output | $2.50 |
| 2026-10-29 | openrouter · moonshotai | Output | $2.30 |
| 2026-10-31 | openrouter · moonshotai | Output | $2.50 |
| 2026-11-01 | openrouter · moonshotai | Output | $2.30 |
| 2026-10-13 | aimlapi · moonshotai | Input | $1.3754 |
| 2026-10-19 | aimlapi · moonshotai | Input | $0.784 |
| 2026-10-20 | aimlapi · moonshotai | Input | $1.3754 |
| 2026-10-21 | aimlapi · moonshotai | Input | $0.784 |
| 2026-10-23 | aimlapi · moonshotai | Input | $1.058 |
| 2026-10-27 | aimlapi · moonshotai | Input | $0.6031 |
| 2026-10-28 | aimlapi · moonshotai | Input | $1.058 |
| 2026-10-29 | aimlapi · moonshotai | Input | $0.6031 |
| 2026-10-31 | aimlapi · moonshotai | Input | $1.058 |
| 2026-11-01 | aimlapi · moonshotai | Input | $0.6031 |
| 2026-10-13 | aimlapi · moonshotai | Output | $4.1262 |
| 2026-10-19 | aimlapi · moonshotai | Output | $3.1634 |
| 2026-10-20 | aimlapi · moonshotai | Output | $4.1262 |
| 2026-10-21 | aimlapi · moonshotai | Output | $3.1634 |
| 2026-10-23 | aimlapi · moonshotai | Output | $3.174 |
| 2026-10-27 | aimlapi · moonshotai | Output | $2.4334 |
| 2026-10-28 | aimlapi · moonshotai | Output | $3.174 |
| 2026-10-29 | aimlapi · moonshotai | Output | $2.4334 |
| 2026-10-31 | aimlapi · moonshotai | Output | $3.174 |
| 2026-11-01 | aimlapi · moonshotai | Output | $2.4334 |
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