OpenAI previewed Ultrafast mode, saying GPT-5.6 Sol can run at up to 14x its usual speed. Powered by Cerebras, Ultrafast generates up to 750 tokens per second for workflows where latency is the product: real-time voice and support, commerce, coding and design, financial research, and security response. It launches first in the OpenAI API to a select group of customers, with broader business access as capacity grows.

Key Takeaways

  • ✓Flagship coding model Sol is now being sold on near-real-time throughput, not just quality.
  • ✓750 tokens/second makes interactive coding agents, voice, and support workflows viable.
  • ✓Access is still a limited API preview; capacity is the gate to broader rollout.
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Up NextUltrafast GPT-5.6 Sol preview: up to 14x speed and 750 tokens/sec for coding and realtime work
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