LLM Comparison
Claude Sonnet 5 vs GPT-5.6 Sol
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 models| Organization | ||
| OpenTools Score | 63 10.4 | 84 7.0 |
| Family | Claude Sonnet | GPT-5.6 |
| Status | Current | Current |
| Release Date | Jun 2026 | Jul 2026 |
| Context Window | 1.0M tokens | 1.1M tokens |
| Input Price | $2.00/M tokens | $4.00/M tokens |
| Output Price | $10.00/M tokens | $20.00/M tokens |
| Pricing Notes | Claude API standard pricing is $2 input and $10 output per million tokens. Cache reads are $0.20, 5-minute cache writes $2.50, and 1-hour cache writes $4 per million tokens. Batch API input/output receives a 50% discount. Current official documentation lists these rates without the previously recorded August 31 introductory expiry; provider-specific rates may differ. | 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. |
| Capabilities | textvisionreasoningcodingtool-useextended-thinkingagents | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents |
| Training Cutoff | — | Feb 16, 2026 |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | claude-sonnet-5 | gpt-5.6-sol |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 53artificial-analysis | 59artificial-analysis |
| Artificial Analysis Intelligence Index v4.3 | 38https://artificialanalysis.ai/models/claude-sonnet-5 | 47https://artificialanalysis.ai/models/gpt-5-6-sol |
| GPQA Diamond | 91.1111artificial-analysis | 94.1414artificial-analysis |
| SciCode | 54.2824artificial-analysis | 57.0602artificial-analysis |
| Terminal-Bench 2.1 | 80.5243artificial-analysis | 88.015artificial-analysis |
| Artificial Analysis Coding Agent Index | — | 80artificial-analysis |
| Artificial Analysis Intelligence Index v4.1.1 | — | 61artificial-analysis |
| View Claude Sonnet 5 | View GPT-5.6 Sol | |
Cost Calculator
Enter your expected monthly token usage to compare costs.
| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Claude Sonnet 5Cheapest | $2.00 | $5.00 | $7.00 | — |
| GPT-5.6 Sol | $4.00 | $10.00 | $14.00 | +100% |
Anthropic
Claude Sonnet 5
Claude Sonnet 5 is Anthropic next-generation Sonnet model and a drop-in upgrade from Sonnet 4.6. Anthropic docs state that adaptive thinking is on by default, manual extended thinking is removed, sampling parameter overrides return errors, and the model supports a 1M token context window with 128K max output.
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.
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