MODEL PROFILE / EDITION 2026.09
GPT-5.5
Teams already pinned to GPT-5.5 snapshots who need a stable, known quantity
Balanced model evidence score; rank 28. No rank delta is shown because there is no prior numeric snapshot.
Best for
Teams already pinned to GPT-5.5 snapshots who need a stable, known quantity
Price & access
$5 in / $30 out per 1M (AA); GPT-5.6 Sol now undercuts it at $4/$20
Evidence summary
Deeply sampled Arena and Design Arena rows plus third-party SWE-bench Pro, but the docs vs AA context-window conflict (1.05M vs 922k) is unresolved.
Edition status
No prior snapshot. Tracked in the September 2026 baseline.
Strengths
- Very well-sampled Arena row (13,258 votes, +/-6)
- SWE-Atlas debugging 44.7% is the best number in ByteDance's cross-vendor table
- 1M-class context with image input
- Mature, widely integrated model
Tradeoffs
- Costs more than GPT-5.6 Sol while scoring lower on SWE-bench Pro
- Arena frontend Elo 1513 is bottom-quartile in this cohort
- No `max` effort tier
- Superseded by GPT-5.6, so investment is short-lived
Score profile
visual 63 · code 72 · agentic 68 · debug 68 · context 84 · speed 60 · value 50
Linked evidence
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