GPT-5.5
Relatively high refusal rate; some normal requests may be filtered.
01
Snapshot
Overall
81
rank #5 of 22
Coding
75
rank #8 of 22
Multimodal
85
rank #8 of 22
Input / Output
$5 / $30
USD per 1M tokens
Context
1.05M
usable recall 90
Speed
~50 tok/s
TTFT 0.8s
Aggregated from public sources and independently weighted; methodology on the Terms page. Scores within 3 points are treated as statistically tied.
02
Specs & pricing
Every tracked field. List API prices in USD per 1M tokens; verify current vendor pricing before purchase.
| Vendor | OpenAI (US) |
| Released / current | 2026.04 |
| Licensing | Closed / managed API |
| Context window | 1.05M |
| Max output | 128K |
| Effective-context score | 90 |
| Input / output price | $5 / $30 per 1M tokens |
| Cache discount | Prompt cache 50% off |
| Free tier | ChatGPT free tier available (rate-limited); Plus $20/month |
| Speed / TTFT | ~50 tok/s / 0.8s |
| Function calling | 95 |
| Refusal rate | ~15% |
| English / Chinese | 94 / 76 |
| Modalities | text, image |
| Fine-tuning | Yes |
| Private deployment | No |
| SOC2 / no-train | yes / yes |
03
Strengths & watch-outs
Strengths
- Balanced with no weak spot
- Richest ecosystem
- Mature plugin/function calling
- Strong creative writing
Watch-outs
- Pricey
- Average long context
- Weak video
04
Where it ranks among 22 models
Overall 81/100 (#5), coding 75 (#8), multimodal 85 (#8). See the full boards and side-by-side compare on the leaderboard.
05
Pricing in practice
Illustrative monthly bill for 100M input + 30M output tokens: $1,400 at list; about $1,175 with 90% of inputs cache-hit. Your mix and cache-hit ratio change this.
Illustrative model using public list rates before any enterprise agreement; cache discount: Prompt cache 50% off.
06
Frequently asked questions
How much does GPT-5.5 cost?
List API pricing is $5 input and $30 output per 1M tokens. Prompt cache 50% off. ChatGPT free tier available (rate-limited); Plus $20/month
What is GPT-5.5's context window, and is it usable end to end?
It advertises a 1.05M window with 128K max output; its effective-context score is 90/100, which is the better predictor of whether long-document details are actually retained.
Is GPT-5.5 good for coding?
Its coding aggregate is 75/100, rank #8 of 22. It is a strong choice for most product engineering.
Can I self-host GPT-5.5?
No. It is a closed managed API; there is no weights download.
How strong is it in Chinese and on multimodal inputs?
Chinese score is 76 versus English 94; multimodal aggregate is 85/100 (rank #8), accepting text, image.