GPT-5.5 (high) vs Kimi K2.7 Code
Which is better for the money: GPT-5.5 (high) by OpenAI or Kimi K2.7 Code by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-09-09.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (high) scores 11.0 points higher (37.3 vs 26.3) but costs 3.4× as much to run the benchmark ($3411 vs $993; flagship vs premium cost classes). They are not alternatives at one budget: pick GPT-5.5 (high) when you need intelligence above 26.3, and Kimi K2.7 Code when 26.3 is enough.
| Metric | GPT-5.5 (high) | Kimi K2.7 Code | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.3 | 26.3 | −29.5% Kimi K2.7 Code is 29.5% less intelligent |
| Total AA cost (lower is better) | $3,410.76 | $992.88 | −70.9% Kimi K2.7 Code is 70.9% cheaper |
| End-to-end time (lower is better) | 18.97s | 41.22s | +117.3% Kimi K2.7 Code is 117.3% slower |
| 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 (high): 29.5% less intelligence, 70.9% less cost to run the AA benchmark, and 117.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 (high) is off the frontier: at the same or lower cost, GPT-6 Astra (high) scores 51.00 for $2917.
- Kimi K2.7 Code is off the frontier: at the same or lower cost, GLM-5.3-Flash scores 41.90 for $280.
GPT-5.5 (high)Kimi K2.7 CodeToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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