GPT-5.5 Instant (June 2026) vs Kimi K2.6 (Reasoning)
Which is better for the money: GPT-5.5 Instant (June 2026) by OpenAI or Kimi K2.6 (Reasoning) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Kimi K2.6 (Reasoning) scores 1.0 points higher (27.0 vs 26.0) but costs 1.4× as much to run the benchmark ($1409 vs $987; both premium class). Pick Kimi K2.6 (Reasoning) when the extra intelligence is worth the premium, otherwise GPT-5.5 Instant (June 2026).
| Metric | GPT-5.5 Instant (June 2026) | Kimi K2.6 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.0 | 27.0 | +3.8% Kimi K2.6 (Reasoning) is 3.8% more intelligent |
| Total AA cost (lower is better) | $986.85 | $1,408.86 | +42.8% Kimi K2.6 (Reasoning) is 42.8% more expensive |
| End-to-end time (lower is better) | 16.68s | 52.97s | +217.6% Kimi K2.6 (Reasoning) is 217.6% slower |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $0.95 / $4.00 | |
| Input modalities | Text, Image | Text, Image, Video |
Kimi K2.6 (Reasoning) vs GPT-5.5 Instant (June 2026): 3.8% more intelligence, 42.8% more cost to run the AA benchmark, and 217.6% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 Instant (June 2026) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- Kimi K2.6 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.5 Instant (June 2026)Kimi K2.6 (Reasoning)Today's Pareto frontierOpen-weights 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-instant-06-26/kimi-k2-6 · Markdown: /api/v1/compare/gpt-5-5-instant-06-26/kimi-k2-6?format=md · llms.txt · agent skill