OpenAI Previews GPT-5.6 Sol Ultrafast at Up to 14x Speed
OpenAI previewed GPT-5.6 Sol Ultrafast on August 13, 2026, saying the Cerebras-powered service can run up to fourteen times faster than the standard version and reach up to roughly 750 output tokens per second. The company is starting with selected API customers; it did not announce universal ChatGPT access, one public price, or a general availability date. Developers should confirm invitation status and region, then compare the same long-context, structured-output, or agent task against the standard model. Record time to first token, total latency, accepted quality, tool behavior, cost, limits, and retries. Peak throughput alone is not enough evidence to replace a production model.

