GPT-5.6 Terra
OpenAI · Released 9 Jul 2026 · gpt-5.6-terra
$2.00
Input price / 1M tokens
#36 of 61, cheapest first
$12.00
Output price / 1M tokens
#44 of 61, cheapest first
1.05M
Context window
#2 of 71
97
Output tokens / second
#30 of 61
63.4%
SWE-bench Pro
#3 of 16
69.6%
DeepSWE v1.1
#8 of 17
87.4%
Terminal-Bench 2.1
#7 of 17
50.2%
OSWorld 2.0
#8 of 10
Summary
GPT-5.6 Terra is a proprietary model from OpenAI, released on 9 Jul 2026.
At $2.00 input and $12.00 output per million tokens, it is #36 of 61 on input price, cheapest first.
Its 1.05M-token context window ranks #2 of 71.
Measured output speed is 97 tokens per second, #30 of 61.
The balanced GPT-5.6 tier for workloads that balance intelligence and cost. It is the successor to the earlier 'mini' tier.
Benchmarks · 5 reported
| Benchmark | Score | Bar | Rank | Source |
|---|---|---|---|---|
| SWE-bench Pro | 63.4% | #3 of 16 | OpenAI launch postSelf-reported | |
| DeepSWE v1.1 | 69.6% | #8 of 17 | OpenAI launch postSelf-reported | |
| Terminal-Bench 2.1 | 87.4% | #7 of 17 | OpenAI launch postSelf-reported | |
| OSWorld 2.0 | 50.2% | #8 of 10 | OpenAI launch postSelf-reported | |
| GPQA Diamond | 92.9% | #6 of 27 | OpenAI launch postSelf-reported |
Self-reported means the lab ran the test itself. A rank appears only where several labs report the same version of a benchmark.
Similar models
Models with the most benchmarks in common with GPT-5.6 Terra, and the closest scores.
SWE-bench Pro
#3 of 16Harder multi-file engineering tasks
- GPT-5.6 Terra63.4
- GPT-5.6 Luna62.7
- GPT-5.6 Sol64.6
- Qwen3.8-Max67.7
DeepSWE v1.1
#8 of 17Long coding tasks in real repos
- GPT-5.6 Terra69.6
- GPT-5.6 Luna67.2
- GPT-5.6 Sol72.7
- Kimi K367.5
- DeepSeek V4 Pro62.7
Terminal-Bench 2.1
#7 of 17Terminal tasks, earlier set
- GPT-5.6 Terra87.4
- GPT-5.6 Luna84.7
- GPT-5.6 Sol88.8
- Kimi K388.3
- Qwen3.8-Max86.6
- DeepSeek V4 Pro87.9
Compare GPT-5.6 Terra side by side
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Sources
- price, tiers, long-context rule: developers.openai.com/api/docs/pricing, checked 2 Oct 2026
- context, max output, knowledge cutoff, modalities, api id: developers.openai.com/api/docs/models/gpt-5.6-terra, checked 2 Oct 2026
- release date, Jul 30 price cut: developers.openai.com/api/docs/changelog, checked 2 Oct 2026
- launch price, benchmarks: openai.com/index/gpt-5-6/, checked 2 Oct 2026
- output speed: artificialanalysis.ai/models/gpt-5-6-terra, checked 2 Oct 2026
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