GPT-5.5 Instant: Benchmarks, Pricing & Context Window
GPT-5.5 Instant is a language model from OpenAI, released in May 2026, with multimodal input, a 400K-token context window, and pricing from $5.00/M input and $30.00/M output.
GPT-5.5 Instant is OpenAI's latest Instant model and the default ChatGPT model released on May 5, 2026. It improves factuality, everyday reasoning, image understanding, STEM answers, concision, conversational tone, and personalization over
GPT-5.5 Instant benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for GPT-5.5 Instant across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How GPT-5.5 Instant holds up as conversations get longer.
Quality Tracker
GPT-5.5 Instant Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Sun Sep 20 2026GPT-5.5 Instant pricing
Providers
GPT-5.5 Instant starts at $5.00 per million input tokens and $30.00 per million output tokens via OpenAI.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 OpenAI | $5.00 | — | $30.00 | 400.0K/128.0K | 0.00 | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
GPT-5.5 Instant context window
Input and output token limits for GPT-5.5 Instant, plus how it ranks on long-context understanding.
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GPT-5.5 Instant latency
GPT-5.5 Instant time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Provider operational metrics
Time to first token, output throughput, and failed-request rate from live model usage
GPT-5.5 Instant examples
Recent arena outputs from GPT-5.5 Instant, picked from the highest-ranked matchups.
GPT-5.5 Instant license
GPT-5.5 Instant is a proprietary model available under its provider's product and API terms, has a knowledge cutoff of August 2025.
- License
- Proprietary
- Hosted access
- Knowledge cutoff
- August 2025
Proprietary license - usage restrictions apply
GPT-5.5 Instant resources
Official sources for GPT-5.5 Instant: provider documentation, official playground, official launch post.
GPT-5.5 Instant vs other models
The most-compared alternatives to GPT-5.5 Instant are Gemini 3 Pro, Seed 2.0 Lite, GPT-5.2. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like GPT-5.5 Instant
Models ranked just above and below GPT-5.5 Instant by LLM Stats score.
FAQ
Common questions about GPT-5.5 Instant.