GPT-5.2 vs Kimi K3
GPT-5.2 (OpenAI) and Kimi K3 (Moonshot) compared on benchmarks, pricing, context window, and use-case rankings.
- Kimi K3 leads on overall intelligence (ECI 157 vs 153).
- GPT-5.2 is cheaper on input tokens — $1.75 vs $3.00 per 1M.
- Kimi K3 has a larger context window (1M vs 400K tokens).
- Kimi K3 ranks higher for coding (99th vs 68th percentile).
| Attribute | GPT-5.2 | Kimi K3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 153 | 157 |
| Coding | 68 | 99 |
| Math | 79 | 83 |
| Reasoning & Knowledge | 60 | 79 |
| Agentic & Tools | 74 | 86 |
| Specifications | ||
| Developer | OpenAI | Moonshot |
| Family | GPT | Kimi |
| Released | Dec 11, 2025 | Jul 16, 2026 |
| Parameters | — | 2.8T |
| Availability | API access | Open weights (non-commercial) |
| Context window | 400K | 1M |
| Price — $/M input | $1.75 | $3.00 |
| Price — $/M output | $14.00 | $14.00 |
| Inputs | file, image, text | text, image |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 96% | 97% |
| APEX | 34% | 39% |
| ARC-AGI | 86% | 95% |
| ARC-AGI-2 | 53% | 60% |
| FrontierMath | 41% | — |
| FrontierMath Tier 4 | 19% | — |
| GDPval (win/tie rate) | 71% | — |
| GPQA Diamond | 91% | 93% |
| GSO (code optimization) | 27% | — |
| Humanity's Last Exam | 28% | 44% |
| LiveCodeBench | 89% | — |
| METR task horizon | 5.9 h | — |
| MMLU-Pro | 87% | — |
| SciCode | 52% | 59% |
| SimpleBench | 46% | — |
| SimpleQA Verified | 39% | 43% |
| SWE-bench Verified | 74% | — |
| Terminal-Bench | 65% | — |
| WebDev Arena | 1480 | 1682 |
| WeirdML | 72% | 83% |
| τ²-bench | 85% | — |
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 GPT-5.2 better than Kimi K3?
On Epoch AI's Capabilities Index, Kimi K3 scores higher (157) than GPT-5.2 (153). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, GPT-5.2 or Kimi K3?
GPT-5.2 is cheaper on input tokens at $1.75 per million, versus $3.00 (representative OpenRouter pricing).
Which has a larger context window, GPT-5.2 or Kimi K3?
Kimi K3 supports up to 1M tokens, compared with 400K for the other.
Which is better for coding, GPT-5.2 or Kimi K3?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Kimi K3 ranks higher — 99th vs 68th percentile among the models tracked on Model Beat.
Want a different match-up? Open the compare tool to add or swap models.
More comparisons
Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.