GPT-5.5 Instant
GPT-5.5 Instant is a model by OpenAI for reasoning, it stands 33rd of 165 on LMArena · Vision, and one seller in the catalogue publishes a price for it.
text + image → text · made by OpenAI
Sold by 2 ways
| Seller | Lane | Rate |
|---|---|---|
| OpenAI api | batch | $2.5per Mtok in$15per Mtok out$0.25per Mtok cacheddevelopers.openai.com · read 2026-08-25 |
| OpenAI api | standard | $5per Mtok in$30per Mtok out$0.5per Mtok cacheddevelopers.openai.com · read 2026-08-25 |
Measured 8 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 33rdof 165 | LMArena · Vision | Score (Elo) | 1276 |
| 42ndof 414 | LMArena · Text | Score (Elo) | 1473 |
| 71stof 78 | Frontiermath tier 4 v2 — Epoch AI | mean_score | 2.439 |
| 82ndof 122 | Frontiermath tiers 1 3 v2 — Epoch AI | mean_score | 26.316 |
| 91stof 235 | Scicode — Epoch AI | Score | 52.546 |
| 120thof 326 | GPQA Diamond | mean_score | 82.513 |
| 156thof 306 | OTIS Mock AIME 2024-2025 | mean_score | 68.056 |
| 234thof 260 | Critpt — Epoch AI | Accuracy | 0 |
About
GPT-5.5 Instant — a text model from OpenAI, sold by one company from $5 in and $30 out per million tokens, placed 42nd of 414 on LMArena · Text.
It takes text and images and returns text, with a context window of 400,000 tokens. It was published in May 2026, trained on material up to December 2025. Its sellers say it can reason step by step and call a tool. The catalogue files it under reasoning. Only OpenAI sells it, at $5 in and $30 out per million tokens. Beside the standard rate there is a batch lane. It has been measured on 8 boards, and stands best at 42nd of 414 on LMArena · Text.
Every current figure
- Maker
- OpenAI
- Register
- model
- Takes
- text + image
- Returns
- text
- Context
- 400,000 tokens
- Longest answer
- 128,000 tokens
- Published
- May 2026
- Knowledge to
- December 2025
- Licence
- not read
- Sellers
- 1
- Price
- $5 in and $30 out per million tokens — OpenAI
- Boards
- 8
- Best place
- 42nd of 414 — LMArena · Text
Known as 1 name
gpt-5.5-instant