GPT-5.6 Sol vs GPT-6 Astra
GPT-5.6 Sol (OpenAI) versus GPT-6 Astra (OpenAI): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 1.5 Credits / M for GPT-5.6 Sol and 3 Credits / M for GPT-6 Astra, so GPT-5.6 Sol is 50% cheaper. Context windows are 1.05M and 1.05M.
GPT-5.6 Solgpt-5.6-solGPT-6 Astragpt-6-astraSpecs side by side
| Item | GPT-5.6 Solgpt-5.6-sol | GPT-6 Astragpt-6-astra |
|---|---|---|
| Input (prompt) · Credits / M | 1.5≈ $0.227 | 3≈ $0.454 |
| Output (completion) · Credits / M | 9≈ $1.36 | 15≈ $2.27 |
| Cache read · Credits / M | 0.15 | 0.3 |
| Context window | 1.05M | 1.05M |
| Max output | 128K | 128K |
| 7-day uptime | 100.0% | 100.0% |
| Latest probe latency | 1.74 s | 3.27 s |
| Measured throughput | 55.3 t/s | 45.3 t/s |
| Protocols | Anthropic Messages / OpenAI Responses | Anthropic Messages / OpenAI Responses |
| Sample monthly cost (10M in + 2M out) | 33≈ $5.00 | 60≈ $9.09 |
Prices are the SoleAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from SoleAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, GPT-5.6 Sol or GPT-6 Astra?
At the SoleAPI default channel price, GPT-5.6 Sol input costs 1.5 Credits / M and GPT-6 Astra input costs 3 Credits / M, so GPT-5.6 Sol is 50% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, GPT-5.6 Sol or GPT-6 Astra?
GPT-5.6 Sol offers 1.05M tokens, GPT-6 Astra offers 1.05M tokens.
Can I switch between GPT-5.6 Sol and GPT-6 Astra at any time?
Yes. SoleAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of GPT-5.6 Sol and GPT-6 Astra differ?
Only GPT-6 Astra: File Input. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both GPT-5.6 Sol and GPT-6 Astra
Free credits on sign-up, pay as you go, no monthly fee.