# GPT-5-Codex vs Kimi K2.7 Code

> Kimi K2.7 Code is the stronger model overall, scoring 43.3 to 37.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-codex-vs-kimi-k2-7-code
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5-Codex scores higher in 1 category and Kimi K2.7 Code in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Kimi K2.7 Code leads 39.0 to 30.9.
- Kimi K2.7 Code is cheaper at $0.95 / $4 per million input/output tokens, against $1.25 / $10 for GPT-5-Codex.
- GPT-5-Codex accepts more context: 400K tokens versus 262K.
- Kimi K2.7 Code has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 37.9 | 43.3 |
| Rank | 192 | 94 |
| Context | 400K | 262K |
| Input $/M | $1.25 | $0.95 |
| Output $/M | $10 | $4 |
| Weights | Proprietary | Open |

## Coding

- GPT-5-Codex: 42.4 (#103)
- Kimi K2.7 Code: 42.9 (#95)

| Benchmark | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| WeirdML | 54.5% | 54.1% |
| DeepSWE | — | 30.5% |
| FrontierCode | — | 30.1% |
| LMArena WebDev | — | 1473 |
| SciCode | — | 47.5% |
| ALE-Bench | — | 886.23 |

## Agentic & Tool Use

- GPT-5-Codex: 31.0 (#72)
- Kimi K2.7 Code: 24.0 (#122)

| Benchmark | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| Terminal-Bench | 44.3% | — |
| APEX-Agents | — | 37.6% |
| GBAEval | — | 0.9% |
| Vending-Bench 2 | — | 5,083 |

## Reasoning

- GPT-5-Codex: 30.9 (#83)
- Kimi K2.7 Code: 39.0 (#61)

| Benchmark | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| SimpleBench | — | 57.9% |
| Kagi LLM Benchmark | 70.3% | — |
| CritPt | — | 10% |
| Chess Puzzles | — | 21% |
| Surface Evolver Bench | — | 48.8% |
| Epoch Capabilities Index | — | 149.97 |

## Math

- GPT-5-Codex: —
- Kimi K2.7 Code: 52.9 (#48)

| Benchmark | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 54% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 95.6% |

## Knowledge

- GPT-5-Codex: —
- Kimi K2.7 Code: 53.5 (#57)

| Benchmark | GPT-5-Codex | Kimi K2.7 Code |
|---|---|---|
| GPQA Diamond | — | 87.9% |
| SimpleQA Verified | — | 36.5% |

## FAQ

### Is GPT-5-Codex better than Kimi K2.7 Code?

Kimi K2.7 Code is the stronger model overall, scoring 43.3 to 37.9 on the Noometry Index.

### Which is cheaper, GPT-5-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-Codex lists at $1.25 and $10.

### Is GPT-5-Codex or Kimi K2.7 Code better for coding?

They score almost the same on coding (42.4 vs 42.9); test both on your own repository before choosing.

### Which has the bigger context window?

GPT-5-Codex does, with 400K tokens against 262K.

### How many benchmarks do GPT-5-Codex and Kimi K2.7 Code share?

1 benchmark has published results for both models. GPT-5-Codex has 3 scored results on Noometry and Kimi K2.7 Code has 19.