GPT-5.5 Instant (June 2026)
Context
n/a
Max output
n/a
Serving providers
0
Cheapest input
n/a /1M
Benchmarks
independent evaluations · source: Artificial AnalysisSpeed & latency
Output speed
158 t/s
tokens / second
Time to first token
0.91s
latency
Headline indices
Individual benchmarks · click a row for effort variants
| Benchmark | Best score | Effort | Cost / task | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Automation Bench | 0.4 | default | — | |||||||||||||||||
| CritPt | 0% | default | — | |||||||||||||||||
| GDPval v2Frozen Aug 18, 2026 | 715.3 | default | — | |||||||||||||||||
| ||||||||||||||||||||
| GPQA Diamond | 82% | default | — | |||||||||||||||||
| Humanity's Last Exam | 20% | default | — | |||||||||||||||||
| Long-Context Reasoning | 70% | default | — | |||||||||||||||||
| Omniscience | 3.7 | default | — | |||||||||||||||||
| Omniscience Accuracy | 0.4 | default | — | |||||||||||||||||
| Omniscience Non Hallucination | 0.3 | default | — | |||||||||||||||||
| SciCode | 53% | default | — | |||||||||||||||||
| Terminal Bench40 | 0.1 | default | — | |||||||||||||||||
| ||||||||||||||||||||
| TerminalBench v2.1 | 35% | default | — | |||||||||||||||||
| ||||||||||||||||||||
| τ-bench Banking | 12% | default | — | |||||||||||||||||
Artificial Analysis last published scores for this benchmark on Sep 9, 2026. Scores here are frozen at that date, and models released since are not on it.
Artificial Analysis last published scores for this benchmark on Aug 18, 2026. Scores here are frozen at that date, and models released since are not on it.
Pricing by serving provider
availabilityNo public price yet. Not offered on-demand at any tracked provider.
Price history
listed seller prices, input and output per 1M tokens Input Output
Price history is accruing. We record a point each day a listed seller price changes; the full backfill lands shortly.
Other OpenAI models
compare pricing across the OpenAI lineup Listed prices from LiteLLM, OpenRouter and Vercel
Every weekday
AI moves fast. Here's your debrief.
News, analysis, tools, and more.
For people who build with AI