GPT-5.6 Sol API prices double to $4 and $20 per million tokens

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The provider of GPT-5.6 Sol has raised its prices. Input now costs $4 per million tokens, up from $2, while output costs $20, up from $10. Both rates have increased by 100% - and output is the bigger part of many bills.

Output often accounts for more of the bill because a model’s response is usually longer than the prompt. When comparing providers, I look at the output price first, rather than the input price.

For comparison, the cheapest models I currently track are Qwen 3.7 Flash at $0.13 per million output tokens and DeepSeek V4 Flash at $0.64.

I update a full comparison of rates for all the models I track, with costs calculated for real-world tasks, every day in the AI cost calculator. The rates come from the public OpenRouter API and may differ from promotions offered directly by providers.

// read moreKimi K3 API price cut: input tokens now $0.45 per millionNewsKimi K3 Price Hike: Output Jumps 11% to $15 per Million TokensNewsGPT-6 Sol Price: Cost Per Million Tokens and Monthly BudgetBenchmarks

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