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GPT 5.5 Pro (latest) API price
openai/gpt-5.5-pro
The cheapest GPT 5.5 Pro (latest) API is $19.50/M input at Cheaper Inference (discount marketplace) - all 5 providers compared below, per 1M tokens.
Rolling name - always points to the newest snapshot of this model. The pinned snapshots are priced separately: GPT 5.5 Pro (04-23 snapshot).
FlagshipOpenAI1.1M context5 sellers
Input
$19.50
per 1M tokens · Cheaper Inference (discount marketplace)
up to $30.00
Output
$117.00
per 1M tokens · Cheaper Inference (discount marketplace)
up to $180.00
Where to buy it
Cheapest GPT 5.5 Pro (latest) API providers compared - 5 sellers, from $19.50/M.
Cost calculator
| Provider | Input $/M | Output $/M | Cached in | Your cost |
|---|---|---|---|---|
| Cheaper Inference (discount marketplace)35% off | 19.50cheapest | 117.00 | 19.50 | |
| OpenRouter (aggregator) | 30.00 | 180.00 | - | |
| Batch | 15.00 | 90.00 | - | |
| OrcaRouter (aggregator) | 30.00 | 180.00 | - | |
| TokenRouter (aggregator) | 30.00 | 180.00 | - | |
| BatchOfficial - OpenAI | 15.00 | 90.00 | - | |
| <272K ctx | 30.00 | 180.00 | - | |
| Flex | 15.00 | 90.00 | - |
1.5× between the cheapest and the dearest of 5 sellers.
Against its tier
- This model$136.50
- Cheapest · GLM 5.3 Flash$0.12
- Tier median · Gemini 3.1 Pro$11.7313
- Dearest · GPT 5.5 Pro (04-23 snapshot)$210.00
#33 of 36 flagship · cheaper than 9%
Details
- Context window
- 1.1M1,050,000 tokens
- Developer
- OpenAI
- Sellers
- 51.5× spread
- Cheapest at
- Cheaper Inference (discount marketplace)
- Cached input
- $19.50where the source publishes one
- Combined
- $136.50in + out per 1M
- Last checked
- 2026-10-12