GPT-5.5 (medium) vs Kimi K2.7 Code
Which is better for the money: GPT-5.5 (medium) by OpenAI or Kimi K2.7 Code by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-08-19.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (medium) scores 8.4 points higher (51.4 vs 43.0) but costs 1.7× as much to run the benchmark ($939 vs $545; both premium class). Pick GPT-5.5 (medium) when the extra intelligence is worth the premium, otherwise Kimi K2.7 Code.
| Metric | GPT-5.5 (medium) | Kimi K2.7 Code | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.4 | 43.0 | −16.3% Kimi K2.7 Code is 16.3% less intelligent |
| Total AA cost (lower is better) | $939.07 | $544.58 | −42.0% Kimi K2.7 Code is 42.0% cheaper |
| End-to-end time (lower is better) | 13.24s | 75.91s | +473.3% Kimi K2.7 Code is 473.3% 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 (medium): 16.3% less intelligence, 42.0% less cost to run the AA benchmark, and 473.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 (medium) is off the frontier: at the same or lower cost, Muse Spark 1.2 (xhigh) scores 56.80 for $639.
- Kimi K2.7 Code is off the frontier: at the same or lower cost, Gemini 3.7 Flash (high) scores 56.00 for $485.
GPT-5.5 (medium)Kimi K2.7 CodeToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-5-medium/kimi-k2-7-code · Markdown: /api/v1/compare/gpt-5-5-medium/kimi-k2-7-code?format=md · llms.txt · agent skill