GPT Astra vs GPT Sol
The within-OpenAI upgrade question. Astra is the generational step and costs $10 and $50 per million tokens; Sol sits at $4 and $20 after August's price cut, and both carry the same 1.05M context window. Astra earns the difference on computer use and long end-to-end work. On ordinary generation, extraction and chat, Sol is the same tool for less than half the money.
| GPT Astra | GPT Sol | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Current release | GPT-6 Astra | GPT-5.6 Sol |
| Tier | Frontier | Frontier |
| Context | 1M | 1M |
| Cost | Frontier price | Premium |
| Modalities | text, vision | text, vision |
| Open weights | No | No |
Cost is a tier, not a quote, providers change prices often. Check OpenAI and OpenAI before you commit. Last updated 2026-09-04.
Which one to pick
GPT AstraOpenAI · GPT-6 Astra
The hardest end-to-end work, computer use, and long agentic runs that span applications
Reach for it when- Computer use, browsing, and multi-application workflows
- Long autonomous runs where a mid-task failure is expensive
GPT SolOpenAI · GPT-5.6 Sol
Frontier-grade generalist work now that Astra has taken the top of the line
Reach for it when- High-volume production work that does not need the top tier
- You want frontier-family context without the flagship bill
Related comparisons
- Claude Fable vs GPT AstraThe top of the market, and the two land within 48 hours of each other: Fable 5.1 on 1 September 2026, GPT-6 Astra on the 3rd.
- Claude Opus vs GPT AstraThe practical version of the frontier question, because Opus 5 costs half what Astra does, $5 and $25 per million tokens against $10 and $50, and Anthropic recommends it as the default for most workloads.
- GPT Astra vs Gemini ProA five-fold price gap between two frontier models.
- Claude Opus vs GPT SolTwo mid-frontier models at almost the same price, now that GPT-6 Astra sits above Sol and Claude Fable 5.1 sits above Opus.
- GPT Sol vs Gemini ProSol is the stronger all-round generalist; Gemini 3.1 Pro is the better value and the reasoning-benchmark leader.
- GPT Sol vs GrokSol is the safer default and scores higher overall; Grok 4.6 matches it on some agentic work at a fraction of the short-context price.