$5 / $30per 1M tokens in / out
$0.50cache read · −90%
$0.90per task at medium?
#110on OpenRouter by tokens · 58.9B / week
Price sheetper 1M tokens
| Input | $5 | list |
| Output | $30 | |
| Cache read | $0.50 | −90% vs input |
| Context · max output | 1.1M · 128K | tokens |
Cost per task by effort?
mediumAPI default$0.9042.4
high$1.5445
xhigh$2.6345.8
per taskHumanity's Last Exam
Same price per token at every effort; the bill grows with reasoning tokens. xhigh costs 2.9× medium for +3.4 points.
Where to buy3 providers · per 1M tokens
| Provider | Input | Output | Context |
|---|---|---|---|
| Azure | $5 | $30 | 1.1M |
| OpenAIlab | $5 | $30 | 1.1M |
| Amazon Bedrock | $5.50 | $33 | 1.1M |
In OpenAI's line-upper 1M in / out
| GPT-4o (2024-05-13) | $5 / $15 | −33% |
| GPT Rosalind Discovery | $5 / $25 | −11% |
| GPT Rosalind Research | $5 / $25 | −11% |
| GPT-5.5 | $5 / $30 | this model |
| GPT Chat Latest | $5 / $30 | 0% |
| Chat Latest | $5 / $30 | 0% |
| GPT-6 Astra | $10 / $50 | +78% |
Cheaper for the same workvs GPT-5.5 at medium
| GPT-6.1 Sol max | -20% | score +53% | $0.72 |
| MiMo v2.6 Pro thinkingOpen | -85% | score +37% | $0.13 |
| GPT-6 Astra low | -9% | score +35% | $0.82 |
| DeepSeek V4.1 Flash 1017 maxOpen | -71% | score +33% | $0.26 |
| GPT-6 Sol xhigh | -42% | score +31% | $0.52 |
Pricing questions
How much does GPT-5.5 cost?›
$5 per 1M input tokens and $30 per 1M output tokens. Cached input is $0.50. One Intelligence Index task costs about $0.90 at the default effort.
Is GPT-5.5 free to use?›
There is no free API tier.
How much does prompt caching save?›
Cache reads cost $0.50 per 1M, 90% below the input price.
Is GPT-5.5 cheaper than GPT-5.4?›
No: $5 / $30 against $2.50 / $15, 100% more per token.
How does effort change the price?›
The price per token is the same at every effort. Higher effort spends more reasoning tokens: a task costs $0.90 at medium, $1.54 at high, $2.63 at xhigh.
What is a cheaper alternative to GPT-5.5?›
GPT-6.1 Sol at max effort costs -20% per task with a score +53% on Humanity's Last Exam.