Aug 13, 2026 · Artificial Intelligence

GPT-5.6 Sol Achieves 14× Speed Boost to 750 Tokens/s with OpenAI’s Ultrafast Mode

OpenAI and Cerebras unveiled an Ultrafast mode for GPT-5.6 Sol that delivers up to 750 tokens per second—14 times faster than the standard baseline—while preserving quality, outpacing rivals such as Claude Fable 5 and Opus 4.8, and reshaping high‑speed AI workflows.

AI InferenceCerebrasGPT-5.6

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GPT-5.6 Sol Achieves 14× Speed Boost to 750 Tokens/s with OpenAI’s Ultrafast Mode

DataFunTalk

May 14, 2026 · Industry Insights

OpenAI’s Rapid Sprint: GPT‑5.6 Leaked and a $400 Subsidy to Oust Claude Code

Within three weeks of GPT‑5.5’s launch, internal code for GPT‑5.6 surfaced, prompting OpenAI to unveil a 2‑3× “ultrafast” mode and a two‑month free Codex offer worth $400 to lure Claude Code users, sparking a high‑speed AI competition with Anthropic’s Opus 4.7 Fast and highlighting a self‑reinforcing acceleration loop toward ASI.

AI accelerationClaude CodeCodex

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OpenAI’s Rapid Sprint: GPT‑5.6 Leaked and a $400 Subsidy to Oust Claude Code