OpenAI

o3 Pro API pricing.

o3 Pro is OpenAI’s model on the API market, released 10 Jun 2025. Prices are per million tokens in USD, as last read from the price list.

$20Input / 1M
$80Output / 1M
200KContext
100KMax output
Capability scores
Epoch AI
Epoch Capabilities Index
147
Range 146 to 150 · #73 of 271 models Epoch has scored

The index combines many benchmarks into one general-capability score; the range is how sure Epoch is of the number. Each area score is this site's average of the model's Epoch results in that area, where 0 is what guessing would score and 100 is perfect. Compare every model, and value for money →

Source: Epoch AI, Capabilities & benchmarking (licensed CC BY 4.0). Data refreshed 2 November 2026. These are Epoch's own tests; other benchmark sites can rank models differently.

Cheaper models that come close
Our working on Epoch's index
  1. GLM-5.3-Flash · Z.ai (Zhipu AI)index 153.22 · 100% cheaper
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  4. DeepSeek V4 Flash 0731 · DeepSeekindex 154.94 · 100% cheaper

Models within 5 points of o3 Pro on Epoch's Capabilities Index that cost less, comparing a typical chat mix (three parts input to one part output). A few points of index is a small difference and says nothing about your task: a place to start testing, not a verdict. Capability against price for every model.

Specification
USD per million tokens
Provider
OpenAI
Model id
openai/o3-pro
Input
$20
Output
$80
Cached input
Not published
Context window
200K tokens
Maximum output
100K tokens
Takes
text, file, image
Returns
text
Tool use
Yes
Reasoning
Yes
Released
10 Jun 2025
First tracked
17 Sept 2026

At $20 per million input tokens, o3 Pro is dearer than 335 of the 340 models on the price list.

Price changes
Tracked since 17 Sept 2026

No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.

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More from OpenAI
Cheapest input first
  1. gpt-oss-20b$0.030 in · $0.13 out
  2. GPT-5 Nano$0.050 in · $0.40 out
  3. gpt-oss-safeguard-20b$0.075 in · $0.30 out
  4. GPT-6 Luna Pro$0.10 in · $0.50 out
  5. GPT-6 Luna$0.10 in · $0.50 out
  6. GPT-4.1 Nano$0.10 in · $0.40 out
  7. gpt-oss-120b$0.15 in · $0.60 out
  8. GPT-4o-mini$0.15 in · $0.60 out

Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.