OpenAI previewed Ultrafast mode in the API for select developer teams. Powered by Cerebras hardware, it delivers up to ~750 tokens/sec (up to 14x faster generation). Target use cases include realtime voice, high-throughput coding and design, and automated security incident response.

Key Takeaways

  • ✓Powered by Cerebras inference hardware, output throughput peaks at ~750 tokens/s.
  • ✓Brings frontier-class intelligence into latency-critical real-time coding workflows.
  • ✓Coding, design generation, and security response are primary target workloads.
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Key Decision Metrics at a Glance

TL;DR Verdict
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GPT-4o · in: $2.5 / out: $10
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🛠️ Ecosystem & IDERules
OpenAI · Gpt 5 6 sol · Ultrafast
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Up NextOpenAI previews Ultrafast mode: GPT-5.6 Sol at up to 14x the speed
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