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OpenAI

OpenAI: GPT-5.6 Sol

GPT-5.6 Sol served by OpenAI through Vercel AI Gateway at 50% lower cost than other available inference providers. This promotion runs through September 18, 2026.

Model facts

Context window
1.05M tokens
Maximum output
128K tokens
Cheapest paid input
$2.5 per 1M tokens
Cheapest paid output
$15 per 1M tokens
Open weights
no
Providers
1

Capabilities and modalities

reasoning, tool calling, attachments, temperature control, text, image, pdf.

Observed price history

  • 2026-08-24: $2.5 input / $15 output per 1M tokens

API providers

  • Kilo Gateway (50% off) — model id openai/gpt-5.6-sol-discounted; $2.5 input / $15 output per 1M tokens; provider documentation