# GPT-5.5 Instant vs Kimi K2.7 Code

> GPT-5.5 Instant and Kimi K2.7 Code score almost the same on the Noometry Index (42.7 vs 43.3), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-5-instant-vs-kimi-k2-7-code
- Last updated: 2026-10-11
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and Kimi K2.7 Code in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K2.7 Code leads 52.9 to 26.5.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 26.3% for GPT-5.5 Instant and 54% for Kimi K2.7 Code.
- Kimi K2.7 Code has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 42.7 | 43.3 |
| Rank | 110 | 94 |
| Context | — | 262K |
| Input $/M | — | $0.95 |
| Output $/M | — | $4 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Instant: 44.3 (#74)
- Kimi K2.7 Code: 42.9 (#95)

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| SciCode | 48.6% | 47.5% |
| DeepSWE | — | 30.5% |
| FrontierCode | — | 30.1% |
| LMArena WebDev | — | 1473 |
| WeirdML | — | 54.1% |
| LMArena Coding | 1433 | — |
| ALE-Bench | — | 886.23 |

## Agentic & Tool Use

- GPT-5.5 Instant: —
- Kimi K2.7 Code: 24.0 (#122)

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| APEX-Agents | — | 37.6% |
| GBAEval | — | 0.9% |
| Vending-Bench 2 | — | 5,083 |

## Reasoning

- GPT-5.5 Instant: 24.9 (#155)
- Kimi K2.7 Code: 39.0 (#61)

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| CritPt | 0% | 10% |
| Chess Puzzles | 12% | 21% |
| Epoch Capabilities Index | 142.52 | 149.97 |
| SimpleBench | — | 57.9% |
| LMArena Hard Prompts | 1426 | — |
| Surface Evolver Bench | — | 48.8% |

## Math

- GPT-5.5 Instant: 26.5 (#259)
- Kimi K2.7 Code: 52.9 (#48)

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26.3% | 54% |
| FrontierMath Tier 4 | 2.4% | 12.2% |
| OTIS Mock AIME 2024-2025 | 68.1% | 95.6% |
| LMArena Math | 1420 | — |

## Knowledge

- GPT-5.5 Instant: 48.9 (#74)
- Kimi K2.7 Code: 53.5 (#57)

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| GPQA Diamond | 82.5% | 87.9% |
| SimpleQA Verified | — | 36.5% |
| LMArena Expert | 1409 | — |

## Multimodal

- GPT-5.5 Instant: 40.0 (#52)
- Kimi K2.7 Code: —

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 52.8 (#80)
- Kimi K2.7 Code: —

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1456 | — |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1431 | — |
| LMArena Spanish | 1429 | — |

## Instruction Following

- GPT-5.5 Instant: 74.2 (#100)
- Kimi K2.7 Code: —

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| LMArena Instruction Following | 1406 | — |

## Long Context

- GPT-5.5 Instant: 43.4 (#96)
- Kimi K2.7 Code: —

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| LMArena Longer Query | 1422 | — |

## Writing & Preference

- GPT-5.5 Instant: 61.8 (#85)
- Kimi K2.7 Code: —

| Benchmark | GPT-5.5 Instant | Kimi K2.7 Code |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1419 | — |
| LMArena Multi-Turn | 1433 | — |

## FAQ

### Is GPT-5.5 Instant better than Kimi K2.7 Code?

GPT-5.5 Instant and Kimi K2.7 Code score almost the same on the Noometry Index (42.7 vs 43.3), so choose on price, context window or the category you care about most.

### Is GPT-5.5 Instant or Kimi K2.7 Code better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 42.9 in the Noometry coding category.

### How many benchmarks do GPT-5.5 Instant and Kimi K2.7 Code share?

8 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Kimi K2.7 Code has 19.