MDL
GPT-5.5 Instant (May 2026)
OpenAI
Verified against Artificial Analysis · Jul 13, 2026
Capability
82
percentile index
Price /M
$5 / $30
in / out
Context
—
Avg score
53.5
7 benchmarks
AA Intelligence
33.5
index
Weights
Closed
Released
May 5, 2026
About
GPT-5.5 Instant (May 2026) is a proprietary model in the GPT family from OpenAI. Benchmarked on 7 evals, averaging 53.5.
Benchmark scores · 7
avg 53.5 — higher is betterPerformance & price
Price in / out$5 / $30 per 1M
Blended price$11.25 / 1M
Median across API providers, via Artificial Analysis. Blended = 3:1 input:output. For reasoning models, latency includes thinking time. Methodology →
History
full ledger →Capability over time
AA Long-Context Reasoningfirst seen at 55.7
10d ago
Terminal-Bench Hardfirst seen at 42.4
10d ago
τ²-benchfirst seen at 49.4
10d ago
IFBenchfirst seen at 71.5
10d ago
SciCodefirst seen at 50.3
10d ago
Humanity's Last Examfirst seen at 20.3
10d ago
Append-only ledger — every observed change to this model's numbers.
API providers
Artificial Analysis$30/M