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OpenAI: GPT-5.6 Sol Pro API Pricing
GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
How much does OpenAI: GPT-5.6 Sol Pro cost for a real workload?
At 10M input + 2M output tokens per month, OpenAI: GPT-5.6 Sol Pro costs about $80 ($40 input + $40 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to OpenAI: GPT-5.6 Sol Pro?
- OpenAI: GPT-5.4 Image 2 — $8 in / $15 out per 1M
- OpenAI: GPT-5 Image — $10 in / $10 out per 1M
- OpenAI: GPT-4o (2024-05-13) — $5 in / $15 out per 1M
- OpenAI: GPT-4 Turbo (batch) — $5 in / $15 out per 1M
- Fireworks: Ember-1 — $3 in / $15 out per 1M
- Anthropic: Claude Sonnet 4.6 — $3 in / $15 out per 1M
Compare OpenAI: GPT-5.6 Sol Pro with other models
OpenAI: GPT-5.6 Sol Pro vs OpenAI: gpt-oss-20bOpenAI: GPT-5.6 Sol Pro vs OpenAI: gpt-oss-20b (batch)OpenAI: GPT-5.6 Sol Pro vs OpenAI: gpt-oss-120b (batch)OpenAI: GPT-5.6 Sol Pro vs OpenAI: GPT-5 Nano (batch)OpenAI: GPT-5.6 Sol Pro vs OpenAI: GPT-4.1 Nano (batch)OpenAI: GPT-5.6 Sol Pro vs OpenAI: GPT-6 Luna Pro (batch)
Frequently asked questions
How much does OpenAI: GPT-5.6 Sol Pro cost?
OpenAI: GPT-5.6 Sol Pro costs $4 per 1M input tokens and $20 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $80.
What is the context window of OpenAI: GPT-5.6 Sol Pro?
OpenAI: GPT-5.6 Sol Pro has a context window of 1,050,000 tokens and can return up to 128,000 output tokens per response.
What are cheaper alternatives to OpenAI: GPT-5.6 Sol Pro?
Cheaper models include OpenAI: GPT-5.4 Image 2 ($8 in / $15 out), OpenAI: GPT-5 Image ($10 in / $10 out), OpenAI: GPT-4o (2024-05-13) ($5 in / $15 out). See the full list on this page.
Is OpenAI: GPT-5.6 Sol Pro free to use?
No. OpenAI: GPT-5.6 Sol Pro is a paid model at $4 input / $20 output per 1M tokens. 20 free models are listed on the free models page.
Provider: openai · Model ID: openai/gpt-5.6-sol-pro · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices