GPT-5.6 Sol vs GPT-5.6 Terra
Same family, same million-token context, different price and depth. Sol is the flagship for complex agentic and scientific work; Terra is the production tier that most workloads should default to. OpenAI cut Terra's price in July 2026, widening the gap and making the case for starting low.
| GPT-5.6 Sol | GPT-5.6 Terra | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Current release | GPT-5.6 Sol | GPT-5.6 Terra |
| Tier | Frontier | Balanced |
| Context | 1M | 1M |
| Cost | Frontier price | Moderate |
| Modalities | text, vision, audio | text, vision, audio |
| Open weights | No | No |
Cost is a tier, not a quote — providers change prices often. Check OpenAI and OpenAI before you commit. Last updated 2026-08-14.
Which one to pick
GPT-5.6 SolOpenAI
The strongest generalist — complex agentic and scientific work across modalities
Reach for it when- Problems where the extra capability changes the outcome
- Research-grade or scientific reasoning
GPT-5.6 TerraOpenAI
Production workloads that need frontier-family quality without the flagship bill
Reach for it when- Production traffic at scale
- Anything where you would notice the flagship bill
Related comparisons
- Claude Opus vs GPT-5.6 SolThe headline matchup, and closer than either vendor's marketing suggests.
- GPT-5.6 Sol vs Gemini ProSol is the stronger all-round generalist; Gemini 3.1 Pro is the better value and the reasoning-benchmark leader.
- GPT-5.6 Sol vs GrokSol is the safer default and scores higher overall; Grok 4.6 matches it on some agentic work at a fraction of the short-context price.
- Claude Sonnet vs GPT-5.6 TerraThe workhorse tier, where most production traffic actually runs.
- GPT-5.6 Sol vs KimiThe open-versus-closed question at the top of the market.