GPT-6 Astra vs GPT-5.6 Sol
A source-backed comparison of token costs and documented API limits.
Compare GPT-6 with GPT-5
Standard text-token costs for one request. Choose the capabilities you need; prices do not measure answer quality or speed.
Astra $0.20 · Sol $0.08 per request
GPT-6 Astra
Input $10.00 · output $50.00 / 1M tokens
Estimated: $0.20
Context 1,050,000 · max input 922,000 · max output 128,000
No additional capabilities selected.
Last verified: 2026-09-11
Matches the requested capabilities and published token limits. Account access is not checked.
Official model informationGPT-5.6 Sol
Input $4.00 · output $20.00 / 1M tokens
Estimated: $0.08
Context 1,050,000 · max input 922,000 · max output 128,000
No additional capabilities selected.
Last verified: 2026-09-11
Matches the requested capabilities and published token limits. Account access is not checked.
Official model informationGPT-5.6 Sol costs $0.12 less per request for this token mix. GPT-5.6 Sol is the lowest-cost option among the models that satisfy the verified requirements. This does not score answer quality or speed.
Billable output includes reasoning tokens. Cache discounts, tools, images, audio, video, fine-tuning, taxes and regional charges are excluded here. Use the full pricing calculator for cache categories and other modes.
GPT-6 Astra and GPT-5.6 Sol are text-token API models with different published rates and broad long-context rules. Use the calculator’s shared registry for request-specific arithmetic and current row-level values.
Astra supports Standard, Batch, Flex and Fast processing. Sol’s registry entry keeps its separately verified modes and rates. Neither estimate includes tool calls, audio, image, video, tax or account-specific charges.
Model limits and behavior change independently of price. Check context and max output values in the comparison component, then confirm the official model page before committing API spend.