API pricing per million tokens
- Input
- $2
- per 1M, list
- Output
- $10
- per 1M tokens
- Cached input
- $0.2
- batch $1 / $5
- Context
- 1.05M
- 128K max output
Price history
List price since Jul 17, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
| Seen | Model | Old price | New price | Change |
|---|---|---|---|---|
| Aug 24, 2026 |  GPT-5.6 Sol ProInput $2.5 to $2, Output $15 to $10, Cached input $0.25 to $0.2 | Input $2.5Output $15Cached input $0.25 | Input $2Output $10Cached input $0.2 | -20% |
| Aug 21, 2026 | GPT-5.6 Sol ProInput $5 to $2.5, Output $30 to $15, Cached input $0.5 to $0.25 | Input $5Output $30Cached input $0.5 | Input $2.5Output $15Cached input $0.25 | -50% |
Through a gateway
Your own numbers100M input and 20M output tokens a month: $400.00 direct.
Helicone$400.00+0%
Kong AI Gateway$400.00+0%
LiteLLM$400.00+0%
Vercel AI Gateway$400.00+0%
AWS Bedrock$400.00+0%
Azure AI Foundry$400.00+0%
Google Vertex AI$400.00+0%
Databricks Mosaic AI$400.00+0%
Hugging Face Inference$400.00+0%
Cloudflare AI Gateway$420.00+5%
Requesty$420.00+5%
Eden AI$422.00+5.5%
OpenRouter$422.00+5.5%
Snowflake Cortex AI$480.00+20%
Martian Gatewayn/a
Portkeyn/a
TrueFoundry AI Gatewayn/a
IBM watsonx.ain/a
OCI Generative AIn/a
NVIDIA NIMn/a
Related models
Muse Spark 1.3Meta · 1M$1.25 / $4.25in / out per 1M$1.25$4.25$0.151MSep 2, 2026
Claude Opus 5.5Anthropic · 1M$4 / $20in / out per 1M$4$20$0.21MSep 22, 2026
Gemini 3.1 Pro PreviewGoogle Gemini API · 1M$2 / $12in / out per 1M$2$12$0.21MFeb 19, 2026
About GPT-5.6 Sol Pro
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.
Takes files, image, text in and returns text. First listed Jul 17, 2026. Blended price $4 per 1M tokens at 3 input to 1 output.
Questions
How much does GPT-5.6 Sol Pro cost?
$2 per million input tokens and $10 per million output tokens, with cached input at $0.2, or $1 and $5 through the Batch API.
What is the context window of GPT-5.6 Sol Pro?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.6 Sol Pro cheapest?
Of 5 routes tracked, OpenAI is cheapest at $1 input and $5 output per million tokens.
Has GPT-5.6 Sol Pro's price changed?
Yes. The output price went from $15 to $10, first seen Aug 24, 2026.
List prices from providers' pages on the date shown; your contract may differ. Logos via logo.dev; trademarks belong to their owners.