Model record
GPT-5.6 Terra model overview
GPT-5.6 Terra is a api + app model from OpenAI. It was released on July 9, 2026. Its strongest case is balanced capability and cost, while buyers should account for closed weights.
GPT-5.6 Terra benchmark snapshot
| Evaluation | Reported score | What it probes |
|---|---|---|
| MMLU-Pro | Not reported | Broad knowledge and multi-step reasoning |
| GPQA Diamond | 92.9 | Graduate-level science reasoning |
| SWE-bench Verified | Not reported | Verified real-repository issue resolution |
| LiveCodeBench | Not reported | Contamination-aware competitive programming |
| SWE-Bench Pro | 63.4 | Longer, harder professional software tasks |
| Artificial Analysis Intelligence Index | 55 | Composite third-party capability index; version matters |
Scores are percentages reported by model creators or benchmark maintainers under varying settings. A blank is preferable to an inferred result. See our methodology.
GPT-5.6 Terra strengths
- Balanced capability and cost
- Strong reported software-agent results
- Million-token long-context evaluations
GPT-5.6 Terra limitations
- Closed weights
- Lower capability ceiling than Sol
Editorial take: Benchmark rank should narrow a shortlist, not close a purchase. Run a private evaluation with representative prompts, failure cases, latency targets, and total token costs.
Compare GPT-5.6 Terra
- GPT-5.6 Terra vs GPT-5.6 Sol — review fit, trade-offs, listed prices, and an evaluation plan.
- GPT-5.6 Terra vs GPT-5.6 Luna — review fit, trade-offs, listed prices, and an evaluation plan.
Source record
Specifications and scores are linked to the best source located during review. Provider-reported results are not presented as third-party lab reproductions.
Read OpenAI GPT-5.6 announcement ↗