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GPT-5.5 Pro

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.

text + image + file → text · made by OpenAI

$30$180per Mtok in / out
OpenAI · 8 sellers

Sold by 12 ways

SellerLaneRate
OpenAI apibatch$15per Mtok in$90per Mtok outdevelopers.openai.com · read 2026-08-24
Databricks cloudstandard$30per Mtok in$180per Mtok out$30per Mtok cached$30per Mtok cache writeraw.githubusercontent.com · read 2026-09-16
Microsoft Azure AI cloudstandard$30per Mtok in$180per Mtok out$3per Mtok cachedraw.githubusercontent.com · read 2026-09-16
OpenAI apistandard$30per Mtok in$180per Mtok outdevelopers.openai.com · read 2026-08-24
Nous Research 2 ways$30per Mtok in$180per Mtok out
Nous Research aggregatorbatch$15per Mtok in$90per Mtok outinference-api.nousresearch.com · read 2026-09-12
Nous Research aggregatorstandard$30per Mtok in$180per Mtok outinference-api.nousresearch.com · read 2026-09-12
OpenRouter 3 ways$30per Mtok in$180per Mtok out
OpenRouter aggregatorbatch$15per Mtok in$90per Mtok outopenrouter.ai · read 2026-08-24
OpenRouter aggregatoropenai/flex$15per Mtok in$90per Mtok outopenrouter.ai · read 2026-08-25
OpenRouter aggregatorstandard$30per Mtok in$180per Mtok outopenrouter.ai · read 2026-08-24
Requesty aggregatoropenai-responses$30per Mtok in$180per Mtok outrouter.requesty.ai · read 2026-08-28
Vercel AI Gateway aggregatorstandard$30per Mtok in$180per Mtok outai-gateway.vercel.sh · read 2026-08-25
Venice AI aggregatorstandard$37.5per Mtok in$225per Mtok outmodels.dev · read 2026-09-16

Measured 18 standings

PlaceBoardMetricScore
1stof 101FrontierMath (Tiers 1-3)mean_score (high)52.4
2ndof 72Frontiermath tier 4 — Epoch AImean_score (xhigh)39.6
3rdof 222Chess puzzles — Epoch AImean_score (xhigh)64
4thof 106Frontiermath tiers 1 3 v2 — Epoch AImean_score (xhigh)87.719
4thof 102Simplebench — Epoch AIScore (AVG@5)0.769
5thof 177Critpt — Epoch AIAccuracy (xhigh)30.571
6thof 290OTIS Mock AIME 2024-2025mean_score (xhigh)100
8thof 161Dtbench — Epoch AIAccuracy (xhigh)96
8thof 123Lmca — Epoch AIScore (xhigh)53.94
10thof 313GPQA Diamondmean_score (xhigh)93.921
11thof 62Frontiermath tier 4 v2 — Epoch AImean_score (xhigh)78.049
13thof 205ARC-AGI-1 (Public Eval)Score (%) (high)98
15thof 230ARC-AGI-1 (Semi-Private)Score (%) (high)96.5
15thof 244Arc agi — Epoch AIScore (high)96.5
20thof 216ARC-AGI-2 (Public Eval)Score (%) (xhigh)90.42
21stof 232ARC-AGI-2 (Semi-Private)Score (%) (high)84.58
24thof 227Arc agi 2 — Epoch AIScore (high)84.58
33rdof 656Epoch capabilities index — Epoch AIECI Score (xhigh)162.03

About

GPT-5.5 Pro — a text model from OpenAI, sold by 8 companies from $30 in and $180 out per million tokens, placed 1st of 101 on FrontierMath (Tiers 1-3).

It takes text, images and files and returns text, with a context window of 1,000,000 tokens. It was published in April 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. Eight companies sell it. The cheapest is $30 in and $180 out per million tokens at Databricks. Beside the standard rate there are batch, flex and separately routed lanes. It has been measured on 18 boards, and stands best at 1st of 101 on FrontierMath (Tiers 1-3).

Every current figure

Maker
OpenAI
Register
model
Takes
text + image + file
Returns
text
Context
1,000,000 tokens
Longest answer
128,000 tokens
Published
April 2026
Knowledge to
December 2025
Licence
not read
Sellers
8
Price
$30 in and $180 out per million tokens — Databricks
Boards
18
Best place
1st of 101 — FrontierMath (Tiers 1-3)

Known as 9 names

GPT-5.5 Pro (High)GPT-5.5 Pro (XHigh)gpt-5.5-pro-pre-release_highgpt-5.5-pro-pre-release_xhighopenai/gpt-5.5-proopenai/gpt-5.5-pro:batchgpt-5.5-proopenai-responses/gpt-5.5-proOpenAI: GPT-5.5 Pro (batch)