LLM Comparison
Claude Sonnet 5 vs GPT-6.1 Sol
Side-by-side specs, pricing & capabilities · Updated September 2026
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2/6 models| Organization | ||
| OpenTools Score | 63 10.5 | |
| Family | Claude Sonnet | GPT-6.1 |
| Status | Current | Current |
| Release Date | Jun 2026 | Sep 2026 |
| Context Window | 1.0M tokens | 1.1M tokens |
| Input Price | $2.00/M tokens | $2.00/M tokens |
| Output Price | $10.00/M tokens | $10.00/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 Standard API, USD per million tokens for prompts with at most 272K input tokens: $2 input, $0.10 cached input, $2.50 cache writes, $10 output. Above 272K input, 2x input/cache and 1.5x output apply to the entire request. Fast mode is 2x Standard (not available with EU data residency); Batch and Flex are 50% below Standard. Regional processing adds 10% where available. Reasoning output tokens are billed as output. The maximum input limit is 922K tokens. |
| Capabilities | textvisionreasoningcodingtool-useextended-thinkingagents | textvisionreasoningcodingtool-usecomputer-uselong-contextcontext-caching |
| Training Cutoff | — | 2026-04-30 |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | claude-sonnet-5 | gpt-6.1-sol |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 53artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3 | 38https://artificialanalysis.ai/models/claude-sonnet-5 | — |
| GPQA Diamond | 91.1111artificial-analysis | — |
| SciCode | 54.2824artificial-analysis | — |
| Terminal-Bench 2.1 | 80.5243artificial-analysis | — |
| HealthBench Professional length-adjusted | — | 64.2openai |
| HealthBench length-adjusted | — | 58.5openai |
| HealthBench Hard length-adjusted | — | 36.2openai |
| HealthBench Consensus length-adjusted | — | 96openai |
| View Claude Sonnet 5 | View GPT-6.1 Sol | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Claude Sonnet 5Cheapest | $2.00 | $5.00 | $7.00 | — |
| GPT-6.1 SolCheapest | $2.00 | $5.00 | $7.00 | — |
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-6.1 Sol
GPT-6.1 Sol is OpenAI's proprietary reasoning model for coding, computer use, and professional workflows. The gpt-6.1-sol API model accepts text and images and returns text. OpenAI documents a 1,050,000-token context window, 922,000 maximum input tokens, and 128,000 maximum output tokens. OpenAI's system card reports first-party HealthBench results; no exact independent Artificial Analysis result was available at the observed time.
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