LLM Comparison
GPT-5.6 Sol vs GPT-6 Sol
Side-by-side specs, pricing & capabilities · Updated September 2026
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2/6 models| Organization | ||
| OpenTools Score | 85 7.1 | |
| Family | GPT-5.6 | GPT-6 |
| Status | Current | Current |
| Release Date | Jul 2026 | Sep 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 | $10.00/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 standard API, USD per million tokens for prompts up to 272K input tokens: $2 input, $0.20 cached input, $2.50 cache writes, $10 output. Above 272K input tokens, the full request costs 2x input/cache and 1.5x output. Batch/Flex cost 50% of Standard; Fast costs 2x; regional processing adds 10% where available. Reasoning output tokens are charged at output rates. |
| Capabilities | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents | textvisionreasoningcodingtool-uselong-contextcontext-caching |
| Training Cutoff | Feb 16, 2026 | 2026-04-20 |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | gpt-5.6-sol | gpt-6-sol |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 59artificial-analysis | — |
| Artificial Analysis Coding Agent Index | 80artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.1.1 | 61artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3 | 47https://artificialanalysis.ai/models/gpt-5-6-sol | — |
| GPQA Diamond | 94.1414artificial-analysis | — |
| SciCode | 57.0602artificial-analysis | — |
| Terminal-Bench 2.1 | 88.015artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3.2 | — | 47.5276426437724artificial-analysis |
| View GPT-5.6 Sol | View GPT-6 Sol | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-6 SolCheapest | $2.00 | $5.00 | $7.00 | — |
| GPT-5.6 Sol | $4.00 | $10.00 | $14.00 | +100% |
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-6 Sol
GPT-6 Sol is OpenAI's reasoning model for professional work. It accepts text and images, produces text, supports a 1,050,000-token context window and 128,000 output tokens, and is available through the Responses and Chat Completions APIs. OpenAI documents the exact gpt-6-sol identifier and standard token pricing.
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