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GPT-5.6 Sol vs GPT-6 Astra: price
GPT-5.6 Sol is 1.8× cheaper than GPT-6 Astra for a typical chat workload (1,500 tokens in, 500 out).
| Item | GPT-5.6 Sol | GPT-6 Astra |
|---|---|---|
| Input per 1M tokens | $5.00 | $10.00 |
| Output per 1M tokens | $30.00 | $50.00 |
| Cached input per 1M | $0.50 | $1.00 |
| 1,000 chat messages1,500 tokens in, 500 out each | $22.50 | $40.00 |
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.18 | $0.35 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.42 | $0.80 |
GPT-5.6 Sol: Main pricing page lists $5 / $30. OpenAI's model page shows a promotional $4 / $20. Prompts over 272K tokens: 2x input, 1.5x output.
GPT-6 Astra: Prompts over 272K tokens: 2x input, 1.5x output.
List prices checked September 28, 2026. Price is half the story: see how people rate each one today.
GPT-5.6 Sol vs GPT-6 Astra in numbers
Output, usually the bigger part of the bill, costs $30.00 on GPT-5.6 Sol and $50.00 on GPT-6 Astra, so GPT-5.6 Sol is 1.7× cheaper there. Input costs $5.00 versus $10.00 per million tokens. For a coding-agent task (60,000 tokens in, 4,000 out) that is $0.42 on GPT-5.6 Sol and $0.80 on GPT-6 Astra. Both accept up to 1.05M tokens of context. GPT-5.6 Sol came out on July 9, 2026 and GPT-6 Astra on September 3, 2026.
GPT-5.6 Sol is made by OpenAI; GPT-6 Astra by OpenAI. Estimate your own bill for both in the cost calculator.
Which one feels dumber today?
- GPT-5.6 SolOpenAI
–no votes yet - GPT-6 AstraOpenAI–no votes yet
Frequently asked questions
Is GPT-5.6 Sol or GPT-6 Astra cheaper?
GPT-5.6 Sol is 1.8× cheaper than GPT-6 Astra for a typical chat workload (1,500 tokens in, 500 out). Output, usually the bigger part of the bill, costs $30.00 on GPT-5.6 Sol and $50.00 on GPT-6 Astra, so GPT-5.6 Sol is 1.7× cheaper there.
Which is better, GPT-5.6 Sol or GPT-6 Astra?
It depends on the task, and price is only part of it. Check how people rate each one today on the GPT-5.6 Sol and GPT-6 Astra pages, and read what users report in Discussions.