GPT-5.5 Pro API Pricing
OpenAI · released 2026-04-23
Also searched as: GPT 5.5 Pro pricing · 5.5 Pro price
GPT-5.5 Pro price
3.00¢ / 1K
18.00¢ / 1K
6.75¢ / 1K
Higher rates apply above a context threshold; see the official site
Official list price from OpenAI, as recorded by models.dev
What it actually costs
| Workload | Tokens | Cost |
|---|---|---|
| Short chat reply | 500 in / 300 out | $0.0690 |
| RAG query | 4,000 in / 500 out | $0.2100 |
| Long document summary | 50,000 in / 1,000 out | $1.68 |
| Code review of a 2k-line file | 30,000 in / 2,000 out | $1.26 |
| 1,000 chat replies/day for 30 days | 30,000 × (500 in / 300 out) | $2,070.00 |
Cost = (input tokens ÷ 1,000,000 × $30.00) + (output tokens ÷ 1,000,000 × $180.00).
Benchmarks
| Benchmark | Value | Source | As of |
|---|---|---|---|
| Epoch Capabilities Index (ECI) | 162.7 | epoch | 2026-04-23 |
| Epoch Mock AIME accuracy | No public data yet | ||
| Epoch FrontierMath (T1–3) accuracy | 87.7% | epoch | 2026-04-23 |
| Arena text rating | No public data yet | ||
| Arena coding rating (human preference votes, not task accuracy) | No public data yet | ||
| Arena math rating | No public data yet | ||
| Arena WebDev rating | No public data yet | ||
Similar ECI, lower price
| Model | ECI | Blended $/1M |
|---|---|---|
| Claude Haiku 5.5 | 160.2 | $0.20 |
| DeepSeek V4.1 Flash 1017 | 159.3 | $0.2625 |
| Gemini 3.7 Flash | 158.4 | $1.50 |
| Gemini 3.8 Flash | 158.6 | $1.50 |
| Muse Spark 1.3 | 158.0 | $2.00 |
More from OpenAI
| Model | Released | Blended $/1M |
|---|---|---|
| GPT-6.1 Terra | 2026-10-26 | $2.00 |
| GPT-6.1 Sol | 2026-09-29 | $4.00 |
| GPT-6 Sol | 2026-09-22 | $4.00 |
| GPT-6 Luna | 2026-09-22 | $0.20 |
| GPT-Live 1 | 2026-09-10 | — |
| GPT Image 2.5 Sunburst | 2026-09-08 | $11.25 |
| GPT Image 2.5 Flare | 2026-09-08 | $11.25 |
| GPT-6 Astra (Fast) | 2026-09-04 | — |
Count tokens & estimate cost for GPT-5.5 Pro See GPT-5.5 Pro on the leaderboard
Prices: OpenAI's official list price as recorded by models.dev; benchmarks: see sources below; last synced 2026-11-06.
FAQ
Who develops GPT-5.5 Pro?
GPT-5.5 Pro is developed by OpenAI, released 2026-04-23.
How much does GPT-5.5 Pro cost per million tokens?
GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens ($67.50 blended), per OpenAI's official list price as recorded by models.dev.
What is the GPT-5.5 Pro API price?
The GPT-5.5 Pro API price is $30.00 per 1M input tokens and $180.00 per 1M output tokens ($67.50 per 1M blended).
How much does GPT-5.5 Pro cost for a typical request?
A short chat reply (500 in / 300 out tokens) costs about $0.0690 on GPT-5.5 Pro, at $30.00/1M input and $180.00/1M output.
Is GPT-5.5 Pro free?
GPT-5.5 Pro's official API list price is $30.00 per 1M input tokens and $180.00 per 1M output tokens. This site tracks list prices only, not free tiers or trial credits — check OpenAI's site for those.
How does GPT-5.5 Pro rank on benchmarks?
GPT-5.5 Pro scores 162.7 on the Epoch Capabilities Index (ECI), ranking #12 of 107 models we track with a published ECI score.
Is there a cheaper model with a similar ECI to GPT-5.5 Pro?
Yes — Claude Haiku 5.5 scores a similar ECI (160.2) at $0.20/1M blended, versus $67.50/1M for GPT-5.5 Pro.
Where does this data come from?
Pricing for GPT-5.5 Pro comes from models.dev and LiteLLM (open MIT-licensed catalogs); benchmark scores come from Epoch AI and LMArena (open CC BY 4.0 licenses) — see /data-sources/. Last synced 2026-11-06.