LLM Comparison
GPT-5.6 Sol vs GPT-5.6 Terra
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 models| Organization | ||
| OpenTools Score | 84 7.0 | 70 10.1 |
| Family | GPT-5.6 | GPT-5.6 |
| Status | Current | Current |
| Release Date | Jul 2026 | Jul 2026 |
| Context Window | 1.1M tokens | 1.1M tokens |
| Input Price | $4.00/M tokens | $2.00/M tokens |
| Output Price | $20.00/M tokens | $12.00/M tokens |
| Pricing Notes | OpenAI promotional standard short-context pricing is $4 input, $0.40 cached input, $5 cache writes, and $20 output per 1M tokens through at least November 21, 2026. Standard long-context pricing is $8 input, $0.80 cached input, $10 cache writes, and $30 output; Batch, Flex, and Fast mode use separate rates. | OpenAI pricing page lists $2.50 input and $15 output per 1M tokens, with GPT-5.6 cache-write and cache-read pricing. |
| Capabilities | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents |
| Training Cutoff | Feb 16, 2026 | Feb 16, 2026 |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | gpt-5.6-sol | gpt-5.6-terra |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 59artificial-analysis | 55artificial-analysis |
| Artificial Analysis Coding Agent Index | 80artificial-analysis | 77.4artificial-analysis |
| Artificial Analysis Intelligence Index v4.1.1 | 61artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3 | 47https://artificialanalysis.ai/models/gpt-5-6-sol | 42.2515artificial-analysis |
| GPQA Diamond | 94.1414artificial-analysis | 92.5253artificial-analysis |
| SciCode | 57.0602artificial-analysis | 54.9769artificial-analysis |
| Terminal-Bench 2.1 | 88.015artificial-analysis | 88.015artificial-analysis |
| View GPT-5.6 Sol | View GPT-5.6 Terra | |
Cost Calculator
Enter your expected monthly token usage to compare costs.
| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.6 TerraCheapest | $2.00 | $6.00 | $8.00 | — |
| GPT-5.6 Sol | $4.00 | $10.00 | $14.00 | +75% |
OpenAI
GPT-5.6 Sol
GPT-5.6 Sol is OpenAI frontier GPT-5.6 model for complex professional work across coding, knowledge work, science, cybersecurity, and agentic workflows. OpenAI model docs list it as the GPT-5.6 alias target with function, web search, file search, and computer use tools, 1.05M context, and 128K max output.
OpenAI
GPT-5.6 Terra
GPT-5.6 Terra is OpenAI balanced GPT-5.6 model for teams that need strong reasoning and agentic performance at lower cost than Sol. OpenAI model docs list a 1.05M token context window, 128K max output, and support for functions, web search, file search, and computer use.
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