GPT-5.5 Instant (June 2026) vs Grok 4.20 0309 v2 (Reasoning)
GPT-5.5 Instant (June 2026) vs Grok 4.20 0309 v2 (Reasoning). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
Verdict
Comparison incomplete
A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
| Metric | GPT-5.5 Instant (June 2026) | Grok 4.20 0309 v2 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.0 | 25.7 | −1.2% Grok 4.20 0309 v2 (Re… is 1.2% less intelligent |
| Total AA cost (lower is better) | $986.85 | Not reported | — not comparable |
| End-to-end time (lower is better) | 16.68s | 23.46s | +40.6% Grok 4.20 0309 v2 (Re… is 40.6% slower |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
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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/grok-4-20 · Markdown: /api/v1/compare/gpt-5-5-instant-06-26/grok-4-20?format=md · llms.txt · agent skill