GPT-5.6 Sol
Reasoning model with a long TTFT; not suited to real-time interaction.
01
Snapshot
Overall
72
rank #11 of 22
Coding
88
rank #3 of 22
Multimodal
80
rank #11 of 22
Input / Output
$5 / $30
USD per 1M tokens
Context
1.05M
usable recall 88
Speed
~25 tok/s
TTFT 2.0s
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 | 2026.07 |
| Licensing | Closed / managed API |
| Context window | 1.05M |
| Max output | 128K |
| Effective-context score | 88 |
| Input / output price | $5 / $30 per 1M tokens |
| Cache discount | Prompt cache 50% off |
| Free tier | No free API tier |
| Speed / TTFT | ~25 tok/s / 2.0s |
| Function calling | 93 |
| Refusal rate | ~14% |
| English / Chinese | 92 / 74 |
| Modalities | text, image |
| Fine-tuning | No |
| Private deployment | No |
| SOC2 / no-train | yes / yes |
03
Strengths & watch-outs
Strengths
- Enhanced reasoning
- Strong code generation
- o-series architecture
Watch-outs
- Expensive
- Slow
- Limited output length
04
Where it ranks among 22 models
Overall 72/100 (#11), coding 88 (#3), multimodal 80 (#11). 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-5.6 Sol cost?
List API pricing is $5 input and $30 output per 1M tokens. Prompt cache 50% off. No free API tier
What is GPT-5.6 Sol'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 88/100, which is the better predictor of whether long-document details are actually retained.
Is GPT-5.6 Sol good for coding?
Its coding aggregate is 88/100, rank #3 of 22. That puts it in the top tier for agentic, multi-file engineering.
Can I self-host GPT-5.6 Sol?
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 74 versus English 92; multimodal aggregate is 80/100 (rank #11), accepting text, image.