GPT-5.6 Sol Pro vs GPT-6 Astra
Price, context window & benchmark comparison
VS
Compare different models
Verdict: GPT-5.6 Sol Pro is 5.0× cheaper than GPT-6 Astra on a typical 3:1 input/output mix.
| GPT-5.6 Sol Pro | GPT-6 Astra | |
|---|---|---|
| Input price / 1M | $2.00 | $10.00 |
| Output price / 1M | $10.00 | $50.00 |
| Blended price (3:1) | $4.00 | $20.00 |
| Cached input / 1M | $0.20 | $1.00 |
| Context window | 1.1M | 1.1M |
| Max output | 128K | 128K |
| Intelligence index | — | 52.7 |
| Coding index | — | 76.9 |
| Providers | — | 6 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-07-09 | 2026-09-04 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GPT-5.6 Sol Pro or GPT-6 Astra?
GPT-5.6 Sol Pro is 5.0× cheaper than GPT-6 Astra on a typical 3:1 input/output mix.
GPT-5.6 Sol Pro vs GPT-6 Astra: which has a bigger context window?
GPT-5.6 Sol Pro: 1,050,000 tokens. GPT-6 Astra: 1,050,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-5.6 Sol Pro ≈ $9,000, GPT-6 Astra ≈ $45,000.
More comparisons
GPT-5.6 Sol Pro vs GLM 5.3 PrimeGPT-5.6 Sol Pro vs Qwen3.8 Max PrimeGPT-5.6 Sol Pro vs Command A+GPT-5.6 Sol Pro vs GPT-6 Luna ProGPT-5.6 Sol Pro vs GPT-6 LunaGPT-5.6 Sol Pro vs GPT-6 Sol ProGPT-5.6 Sol Pro vs GPT-6 SolGPT-5.6 Sol Pro vs Claude Opus 5.5GPT-5.6 Sol Pro vs MiMo-V2.6-Pro-UltraSpeedGPT-5.6 Sol Pro vs MiMo-V2.6-FlashGPT-5.6 Sol Pro vs Grok 4.7GPT-5.6 Sol Pro vs Qwen3.8 Omni FlashGPT-5.6 Sol Pro vs GLM 5.3 FlashXGPT-5.6 Sol Pro vs DeepSeek V4.1 FlashGPT-5.6 Sol Pro vs GPT-6 Astra ProGPT-5.6 Sol Pro vs Qwen3.8 Max (0902)GPT-6 Astra vs GLM 5.3 PrimeGPT-6 Astra vs Qwen3.8 Max PrimeGPT-6 Astra vs Command A+GPT-6 Astra vs GPT-6 Luna ProGPT-6 Astra vs GPT-6 LunaGPT-6 Astra vs GPT-6 Sol ProGPT-6 Astra vs GPT-6 SolGPT-6 Astra vs Claude Opus 5.5