OpenAI's GPT-5.6 Sol model is now cheaper for developers
What's the story
OpenAI has announced a major price cut for its frontier GPT-5.6 Sol model, reducing costs by over 20% for developers. The new pricing will be effective for the next three months as the company faces stiff competition from Anthropic and Chinese AI models. The price cuts are applicable to OpenAI's application programming interface (API) and eligible plans for credits on its agentic AI product ChatGPT Work and coding tool Codex.
Cost
New rates for standard short-context use
The new pricing structure for the GPT-5.6 Sol model is $4 per million input tokens and $20 per million output tokens for standard short-context use.
This is a reduction from the previous rates of $5 and $30, respectively.
However, it's worth noting that prices for Pro, Plus, and Business subscriptions remain unchanged under this new pricing strategy by OpenAI.
Previous adjustments
Price cuts for smaller models as well
Just last month, OpenAI had also slashed prices for its smaller models.
The mid-tier GPT-5.6 Terra model saw a 20% reduction in its price, while the lower-cost Luna model was discounted by as much as 80%.
These changes are part of OpenAI's ongoing efforts to stay competitive in the rapidly evolving AI landscape.
Market comparison
Comparing with Anthropic's Claude Fable 5, Opus 5
To put OpenAI's new pricing in perspective, Anthropic's frontier Claude Fable 5 model is priced at $10 per million input tokens and $50 per million output tokens. Its Claude Opus 5 model costs $5 per million input tokens and $25 per million output tokens.