Noometry

Model comparison

GPT-6.1 Sol vs Kimi K2.7 Code

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 43.3 on the Noometry Index. Kimi K2.7 Code costs 2.3× less per token, which makes it the better buy when GPT-6.1 Sol's lead doesn't matter for your workload.

Last verified . 13 shared benchmarks.

GPT-6.1 Sol OpenAI

65.6

Rank #6 Confirmed

Kimi K2.7 Code Moonshot AI

43.3

Rank #94 Confirmed

Summary

  • They share 13 benchmarks with published results for both. GPT-6.1 Sol scores higher in 5 categories and Kimi K2.7 Code in 0 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-6.1 Sol leads 81.9 to 39.0.
  • The biggest single-benchmark swing is FrontierMath Tier 4: 100% for GPT-6.1 Sol and 12.2% for Kimi K2.7 Code.
  • Kimi K2.7 Code is cheaper at $0.95 / $4 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
  • GPT-6.1 Sol accepts more context: 1.05M tokens versus 262K.
  • Kimi K2.7 Code has downloadable open weights; the other is API-only.

Side by side

GPT-6.1 SolKimi K2.7 Code
ProviderOpenAIMoonshot AI
Noometry Index65.643.3
Released2026-09-292026-06-12
WeightsProprietaryOpen
Context window1.05M262K
Max output128K262K
Input $ / M tokens$2$0.95
Output $ / M tokens$10$4
Results tracked3419

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Category by category

Coding GPT-6.1 Sol leads

GPT-6.1 Sol: 63.2 (#8), Kimi K2.7 Code: 42.9 (#95)

BenchmarkGPT-6.1 SolKimi K2.7 Code
DeepSWE75.2%30.5%
FrontierCode50.2%30.1%
LMArena WebDev17551473
SciCode55.8%47.5%
WeirdML—54.1%
LMArena Coding1487—
ALE-Bench—886.23

Agentic & Tool Use GPT-6.1 Sol leads

GPT-6.1 Sol: 39.6 (#26), Kimi K2.7 Code: 24.0 (#122)

BenchmarkGPT-6.1 SolKimi K2.7 Code
APEX-Agents60%37.6%
GBAEval—0.9%
GDP.pdf32%—
Vending-Bench 2—5,083

Reasoning GPT-6.1 Sol leads

GPT-6.1 Sol: 81.9 (#2), Kimi K2.7 Code: 39.0 (#61)

BenchmarkGPT-6.1 SolKimi K2.7 Code
CritPt31.7%10%
Chess Puzzles61%21%
Epoch Capabilities Index166.09149.97
ARC-AGI-294.2%—
SimpleBench—57.9%
NYT Connections (extended)95.5%—
ARC-AGI-198.5%—
EBR-Bench54.3%—
LMArena Hard Prompts1466—
Mystery Game Puzzles80%—
Surface Evolver Bench—48.8%

Math GPT-6.1 Sol leads

GPT-6.1 Sol: 93.7 (#1), Kimi K2.7 Code: 52.9 (#48)

BenchmarkGPT-6.1 SolKimi K2.7 Code
FrontierMath (Tiers 1-3)93.7%54%
FrontierMath Tier 4100%12.2%
OTIS Mock AIME 2024-2025100%95.6%
ProofBench99%—
LMArena Math1464—

Knowledge GPT-6.1 Sol leads

GPT-6.1 Sol: 71.8 (#4), Kimi K2.7 Code: 53.5 (#57)

BenchmarkGPT-6.1 SolKimi K2.7 Code
GPQA Diamond95.4%87.9%
SimpleQA Verified73.9%36.5%
LMArena Expert1502—

Multimodal Not comparable

GPT-6.1 Sol: 52.7 (#5), Kimi K2.7 Code: —

BenchmarkGPT-6.1 SolKimi K2.7 Code
LMArena Vision1288—
Furniture Assembly80%—

Multilingual Not comparable

GPT-6.1 Sol: 54.3 (#46), Kimi K2.7 Code: —

BenchmarkGPT-6.1 SolKimi K2.7 Code
LMArena Non-English1438—
LMArena Chinese1477—
LMArena Russian1455—

Instruction Following Not comparable

GPT-6.1 Sol: 77.0 (#29), Kimi K2.7 Code: —

BenchmarkGPT-6.1 SolKimi K2.7 Code
LMArena Instruction Following1468—

Long Context Not comparable

GPT-6.1 Sol: 44.9 (#54), Kimi K2.7 Code: —

BenchmarkGPT-6.1 SolKimi K2.7 Code
LMArena Longer Query1465—

Writing & Preference Not comparable

GPT-6.1 Sol: 63.6 (#63), Kimi K2.7 Code: —

BenchmarkGPT-6.1 SolKimi K2.7 Code
LMArena Text1447—
LMArena Creative Writing1432—
LMArena Multi-Turn1449—

Frequently asked questions

Is GPT-6.1 Sol better than Kimi K2.7 Code?

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 43.3 on the Noometry Index. Kimi K2.7 Code costs 2.3× less per token, which makes it the better buy when GPT-6.1 Sol's lead doesn't matter for your workload.

Which is cheaper, GPT-6.1 Sol 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-6.1 Sol lists at $2 and $10.

Is GPT-6.1 Sol or Kimi K2.7 Code better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 63.2 versus 42.9 in the Noometry coding category.

Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 262K.

How many benchmarks do GPT-6.1 Sol and Kimi K2.7 Code share?

13 benchmarks have published results for both models. GPT-6.1 Sol has 34 scored results on Noometry and Kimi K2.7 Code has 19.

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