GPT-5.1 vs Kimi K2.6
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Kimi K2.6 by Moonshot AI wins on 5 of 9 benchmarks against GPT-5.1 by OpenAI, which leads on 4. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, Kimi K2.6 scores 61.8 on AA Coding Index compared to GPT-5.1's 49.4, while Kimi K2.6 scores 1260 on Design Arena ELO compared to GPT-5.1's 1158, while Kimi K2.6 scores 1282 on Website Arena ELO compared to GPT-5.1's 1179.
Reasoning: In reasoning, GPT-5.1 scores 86.2% on GPQA Diamond compared to Kimi K2.6's 83.3%, while GPT-5.1 scores 75.7% on τ²-Bench Airline compared to Kimi K2.6's 73.7%.
Context: In context, GPT-5.1 scores 400K on Context Length compared to Kimi K2.6's 262K.
Pricing Comparison
GPT-5.1 costs $1.3/1M input tokens and $10.0/1M output tokens, while Kimi K2.6 costs $0.95/1M input and $4.0/1M output. Kimi K2.6 is the more affordable option for API usage.
Verdict
Kimi K2.6 leads across the board in affordability, making it the stronger overall choice in this comparison.
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GPT-5.1 vs Kimi K2.6 — FAQ
Which is better, GPT-5.1 or Kimi K2.6?
Kimi K2.6 wins on more benchmarks overall (5 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 compare to Kimi K2.6 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-5.1 cheaper than Kimi K2.6?
Yes, Kimi K2.6 is cheaper. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens. Kimi K2.6 costs $0.95/1M input and $4.0/1M output tokens.
Which is faster, GPT-5.1 or Kimi K2.6?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the GPT-5.1 vs Kimi K2.6 comparison cover?
This comparison covers 9 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Coding Index, Cached Input Cost, Design Arena ELO, τ²-Bench Airline, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.