Model Library
OpenAIReleased April 23, 2026GPT-5.5 (low)
OpenAI · Released April 23, 2026
Intelligence score
43
At a glance
- Intelligence
- 43
- Speed
- 81.7tokens/sec
- Latency
- 1.79stime to first token
- Input price
- $5.00per 1M tokens
- Output price
- $30.00per 1M tokens
- Context window
- 920Ktokens
- Parameters
- —
Summary
Comparison summary
GPT-5.5 (low) scores 43 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier (median: 28). GPT-5.5 (low) generates output at 81.7 tokens per second (based on OpenAI's API), which is above average compared to other reasoning models in a similar price tier (median: 81.2 t/s). GPT-5.5 (low) costs $5.00 per 1M input tokens (at the higher end, median: $1.50) and $30.00 per 1M output tokens (at the higher end, median: $8.40), based on OpenAI's API.
Specifications
Technical specifications
| Model name | GPT-5.5 (low) |
|---|---|
| Provider | OpenAI |
| Release date | April 23, 2026 |
| Intelligence score | 43 |
| Speed | 81.7 tokens/sec |
| Latency (TTFT) | 1.79s |
| Input price | $5.00 / 1M tokens |
| Output price | $30.00 / 1M tokens |
| Context window | 920,000 tokens |
| Parameters | — |
| Reasoning | Yes |
| Input modalities | text, image |
| Output modalities | — |
| Open weights | No |
| License | — |
| API availability | — |
| Source | Model Intelligence legacy profile: gpt-5-5-low |
Pricing
Token prices
Price per 1M tokens
GPT-5.5 (low), as listed in the catalog record
- Input$5.00
- Output$30.00
| Token type | Price per 1M |
|---|---|
| Input | $5.00 |
| Output | $30.00 |
Model Intelligence legacy profile: gpt-5-5-low
FAQ · 19
Frequently asked questions
GPT-5.5 (low) was released on April 23, 2026.
GPT-5.5 (low) was created by OpenAI.
GPT-5.5 (low) scores 43 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier (median: 28).
GPT-5.5 (low) generates output at 81.7 tokens per second (based on OpenAI's API), which is above average compared to other reasoning models in a similar price tier (median: 81.2 t/s).
GPT-5.5 (low) has a time to first token (TTFT) of 1.79s (based on OpenAI's API), which is better than average compared to other reasoning models in a similar price tier (median: 2.78s).
GPT-5.5 (low) costs $5.00 per 1M input tokens (at the higher end, median: $1.50) and $30.00 per 1M output tokens (at the higher end, median: $8.40), based on OpenAI's API.
GPT-5.5 (low) costs $5.00 per 1M input tokens and $30.00 per 1M output tokens (based on OpenAI's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $4.35 per 1M tokens. Pricing may vary by provider.
When evaluated on the Intelligence Index, GPT-5.5 (low) generated 6.8M output tokens, which is very competitive compared to other reasoning models in a similar price tier (median: 72M).
Yes, GPT-5.5 (low) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
GPT-5.5 (low) supports text and image input.
GPT-5.5 (low) supports text output.
Yes, GPT-5.5 (low) supports image input and can analyze, describe, and answer questions about images.
Yes, GPT-5.5 (low) is multimodal. It can process text and image input and generate text output.
GPT-5.5 (low) has a context window of 920k tokens. This determines how much text and conversation history the model can process in a single request.
No, GPT-5.5 (low) is proprietary. The model weights are not publicly available.
GPT-5.5 (low) is a proprietary model and OpenAI has not disclosed the model size or parameter count.
GPT-5.5 (low) achieves a score of 43 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, GPT-5.5 (low) is available via API through 2 providers.
GPT-5.5 (low) is available through 2 API providers.