Kimi K2.5 vs Kimi K3
Kimi K2.5 (Moonshot) and Kimi K3 (Moonshot) compared on benchmarks, pricing, context window, and use-case rankings.
- Kimi K3 leads on overall intelligence (ECI 159 vs 149).
- Kimi K3 is cheaper on input tokens: $0.28 vs $0.60 per 1M.
- Kimi K3 has a larger context window (1M vs 262K tokens).
- Kimi K3 ranks higher for coding (94th vs 33rd percentile).
| Attribute | Kimi K2.5 | Kimi K3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 149 | 159 |
| Coding | 33 | 94 |
| Math | 38 | 60 |
| Reasoning & Knowledge | 22 | 64 |
| Agentic & Tools | 40 | 53 |
| Specifications | ||
| Developer | Moonshot | Moonshot |
| Family | Kimi | Kimi |
| Released | Feb 2, 2026 | Jul 16, 2026 |
| Parameters | 1T | 2.8T |
| Availability | Open weights (unrestricted) | Open weights (non-commercial) |
| Context window | 262K | 1M |
| Price — $/M input | $0.60 | $0.28 |
| Price — $/M output | $3.00 | $9.94 |
| Inputs | text, image | text, image, video |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 92% | 97% |
| APEX | 14% | 48% |
| ARC-AGI | 65% | 95% |
| ARC-AGI-2 | 12% | 60% |
| FrontierMath | 28% | — |
| FrontierMath Tier 4 | 4% | — |
| GPQA Diamond | 88% | 93% |
| Humanity's Last Exam | 24% | 47% |
| SciCode | 49% | 60% |
| SimpleBench | 47% | 61% |
| SimpleQA Verified | 34% | 51% |
| SWE-bench Verified | 74% | — |
| Terminal-Bench | 43% | — |
| WebDev Arena | 1436 | 1674 |
| WeirdML | 46% | 83% |
| τ²-bench | 96% | — |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Kimi K2.5 better than Kimi K3?
On Epoch AI's Capabilities Index, Kimi K3 scores higher (159) than Kimi K2.5 (149). The right pick depends on your task, so compare their coding, math, and reasoning scores in the table above.
Which is cheaper, Kimi K2.5 or Kimi K3?
Kimi K3 is cheaper on input tokens at $0.28 per million, versus $0.60 (representative OpenRouter pricing).
Which has a larger context window, Kimi K2.5 or Kimi K3?
Kimi K3 supports up to 1M tokens, compared with 262K for the other.
Which is better for coding, Kimi K2.5 or Kimi K3?
Kimi K3 ranks higher across coding benchmarks like WebDev Arena and SciCode: 94th vs 33rd percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.