GPT-5.5 (xhigh) vs Kimi K2.7 Code
Which is better for the money: GPT-5.5 (xhigh) by OpenAI or Kimi K2.7 Code by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-08-07.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (xhigh) scores 13.3 points higher (56.3 vs 43.0) but costs 5.1× as much to run the benchmark ($2778 vs $545; flagship vs premium cost classes). They are not alternatives at one budget: pick GPT-5.5 (xhigh) when you need intelligence above 43.0, and Kimi K2.7 Code when 43.0 is enough.
| Metric | GPT-5.5 (xhigh) | Kimi K2.7 Code | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 56.3 | 43.0 | −23.6% Kimi K2.7 Code is 23.6% less intelligent |
| Total AA cost (lower is better) | $2,778.13 | $544.58 | −80.4% Kimi K2.7 Code is 80.4% cheaper |
| End-to-end time (lower is better) | 89.49s | 66.82s | −25.3% Kimi K2.7 Code is 25.3% faster |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $0.95 / $4.00 | |
| Input modalities | Not reported | Not reported |
Kimi K2.7 Code vs GPT-5.5 (xhigh): 23.6% less intelligence, 80.4% less cost to run the AA benchmark, and 25.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 (xhigh) is off the frontier: at the same or lower cost, Claude Opus 5 (Adaptive Reasoning, High Effort) scores 61.50 for $1974.
- Kimi K2.7 Code is off the frontier: at the same or lower cost, GPT-5.6 Luna (max) scores 52.30 for $172.
GPT-5.5 (xhigh)Kimi K2.7 CodeToday's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-5/kimi-k2-7-code · Markdown: /api/v1/compare/gpt-5-5/kimi-k2-7-code?format=md · llms.txt · agent skill