GPT-5.5 Pro vs GPT-6 Sol Pro
Price, context window & benchmark comparison
VS
Compare different models
Verdict: GPT-6 Sol Pro is 16.9× cheaper than GPT-5.5 Pro on a typical 3:1 input/output mix.
| GPT-5.5 Pro | GPT-6 Sol Pro | |
|---|---|---|
| Input price / 1M | $30.00 | $2.00 |
| Output price / 1M | $180.00 | $10.00 |
| Blended price (3:1) | $67.50 | $4.00 |
| Cached input / 1M | — | $0.20 |
| Context window | 1.1M | 1.1M |
| Max output | 128K | 128K |
| Intelligence index | — | — |
| Coding index | — | — |
| Providers | — | 6 |
| Best provider uptime (30m) | — | 99.9% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-04-24 | 2026-09-22 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GPT-5.5 Pro or GPT-6 Sol Pro?
GPT-6 Sol Pro is 16.9× cheaper than GPT-5.5 Pro on a typical 3:1 input/output mix.
GPT-5.5 Pro vs GPT-6 Sol Pro: which has a bigger context window?
GPT-5.5 Pro: 1,050,000 tokens. GPT-6 Sol Pro: 1,050,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-5.5 Pro ≈ $150,000, GPT-6 Sol Pro ≈ $9,000.
More comparisons
GPT-5.5 Pro vs GLM 5.3 PrimeGPT-5.5 Pro vs Qwen3.8 Max PrimeGPT-5.5 Pro vs Command A+GPT-5.5 Pro vs GPT-6 Luna ProGPT-5.5 Pro vs GPT-6 LunaGPT-5.5 Pro vs GPT-6 SolGPT-5.5 Pro vs Claude Opus 5.5GPT-5.5 Pro vs MiMo-V2.6-Pro-UltraSpeedGPT-5.5 Pro vs MiMo-V2.6-FlashGPT-5.5 Pro vs Grok 4.7GPT-5.5 Pro vs Qwen3.8 Omni FlashGPT-5.5 Pro vs GLM 5.3 FlashXGPT-5.5 Pro vs DeepSeek V4.1 FlashGPT-5.5 Pro vs GPT-6 AstraGPT-5.5 Pro vs GPT-6 Astra ProGPT-5.5 Pro vs Qwen3.8 Max (0902)GPT-6 Sol Pro vs GLM 5.3 PrimeGPT-6 Sol Pro vs Qwen3.8 Max PrimeGPT-6 Sol Pro vs Command A+GPT-6 Sol Pro vs GPT-6 Luna ProGPT-6 Sol Pro vs GPT-6 LunaGPT-6 Sol Pro vs GPT-6 SolGPT-6 Sol Pro vs Claude Opus 5.5GPT-6 Sol Pro vs MiMo-V2.6-Pro-UltraSpeed