GPT-5.6 Terra
01
Snapshot
Overall
62
rank #21 of 22
Coding
70
rank #12 of 22
Multimodal
69
rank #19 of 22
Input / Output
$2.5 / $15
USD per 1M tokens
Context
1.05M
usable recall 88
Speed
~60 tok/s
TTFT 0.5s
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 | $2.5 / $15 per 1M tokens |
| Cache discount | Prompt cache 50% off |
| Free tier | No free API |
| Speed / TTFT | ~60 tok/s / 0.5s |
| Function calling | 90 |
| Refusal rate | ~13% |
| English / Chinese | 88 / 72 |
| Modalities | text, image |
| Fine-tuning | No |
| Private deployment | No |
| SOC2 / no-train | yes / yes |
03
Strengths & watch-outs
Strengths
- OpenAI quality
- Halved price
- Rich ecosystem
Watch-outs
- Below GPT-5.5
- Average reasoning
04
Where it ranks among 22 models
Overall 62/100 (#21), coding 70 (#12), multimodal 69 (#19). 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: $700 at list; about $588 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 Terra cost?
List API pricing is $2.5 input and $15 output per 1M tokens. Prompt cache 50% off. No free API
What is GPT-5.6 Terra'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 Terra good for coding?
Its coding aggregate is 70/100, rank #12 of 22. It is a strong choice for most product engineering.
Can I self-host GPT-5.6 Terra?
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 72 versus English 88; multimodal aggregate is 69/100 (rank #19), accepting text, image.