Model comparison
GPT-5.2 Codex vs Kimi K2.7 Code
GPT-5.2 Codex and Kimi K2.7 Code score almost the same on the Noometry Index (42.6 vs 43.3), so choose on price, context window or the category you care about most.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. GPT-5.2 Codex scores higher in 2 categories and Kimi K2.7 Code in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in agentic & tool use, where GPT-5.2 Codex leads 41.0 to 24.0.
- Kimi K2.7 Code is cheaper at $0.95 / $4 per million input/output tokens, against $1.75 / $14 for GPT-5.2 Codex.
- GPT-5.2 Codex accepts more context: 400K tokens versus 262K.
- Kimi K2.7 Code has downloadable open weights; the other is API-only.
Side by side
| GPT-5.2 Codex | Kimi K2.7 Code | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 42.6 | 43.3 |
| Released | 2025-12-18 | 2026-06-12 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 128K | 262K |
| Input $ / M tokens | $1.75 | $0.95 |
| Output $ / M tokens | $14 | $4 |
| Results tracked | 5 | 19 |
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Category by category
Coding GPT-5.2 Codex leads
GPT-5.2 Codex: 45.5 (#71), Kimi K2.7 Code: 42.9 (#95)
| Benchmark | GPT-5.2 Codex | Kimi K2.7 Code |
|---|---|---|
| LMArena WebDev | 1339 | 1473 |
| ALE-Bench | 1,300 | 886.23 |
| DeepSWE | — | 30.5% |
| FrontierCode | — | 30.1% |
| SWE-bench Verified (bash only) | 72.8% | — |
| SWE-bench Multilingual | 66.3% | — |
| SciCode | — | 47.5% |
| WeirdML | — | 54.1% |
Agentic & Tool Use GPT-5.2 Codex leads
GPT-5.2 Codex: 41.0 (#22), Kimi K2.7 Code: 24.0 (#122)
| Benchmark | GPT-5.2 Codex | Kimi K2.7 Code |
|---|---|---|
| Terminal-Bench | 66.5% | — |
| APEX-Agents | — | 37.6% |
| GBAEval | — | 0.9% |
| Vending-Bench 2 | — | 5,083 |
Reasoning Not comparable
GPT-5.2 Codex: —, Kimi K2.7 Code: 39.0 (#61)
| Benchmark | GPT-5.2 Codex | Kimi K2.7 Code |
|---|---|---|
| SimpleBench | — | 57.9% |
| CritPt | — | 10% |
| Chess Puzzles | — | 21% |
| Surface Evolver Bench | — | 48.8% |
| Epoch Capabilities Index | — | 149.97 |
Math Not comparable
GPT-5.2 Codex: —, Kimi K2.7 Code: 52.9 (#48)
| Benchmark | GPT-5.2 Codex | Kimi K2.7 Code |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 54% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 95.6% |
Knowledge Not comparable
GPT-5.2 Codex: —, Kimi K2.7 Code: 53.5 (#57)
| Benchmark | GPT-5.2 Codex | Kimi K2.7 Code |
|---|---|---|
| GPQA Diamond | — | 87.9% |
| SimpleQA Verified | — | 36.5% |
Frequently asked questions
Is GPT-5.2 Codex better than Kimi K2.7 Code?
GPT-5.2 Codex and Kimi K2.7 Code score almost the same on the Noometry Index (42.6 vs 43.3), so choose on price, context window or the category you care about most.
Which is cheaper, GPT-5.2 Codex or Kimi K2.7 Code?
Kimi K2.7 Code is cheaper. It lists at $0.95 per million input tokens and $4 per million output tokens; GPT-5.2 Codex lists at $1.75 and $14.
Is GPT-5.2 Codex or Kimi K2.7 Code better for coding?
GPT-5.2 Codex scores higher on coding benchmarks: 45.5 versus 42.9 in the Noometry coding category.
Which has the bigger context window?
GPT-5.2 Codex does, with 400K tokens against 262K.
How many benchmarks do GPT-5.2 Codex and Kimi K2.7 Code share?
2 benchmarks have published results for both models. GPT-5.2 Codex has 5 scored results on Noometry and Kimi K2.7 Code has 19.