GPT-5.6 Is Real (a Codex Log Says So) — Everything Else Is Made Up

Short summary

One verifiable datapoint confirms GPT-5.6 exists in OpenAI's infrastructure: a Codex backend entry that briefly exposed the model name before being rolled back. Everything else circulating (benchmarks, pricing, context specs, release dates) is unverified speculation from developer forums. For production: keep model names configurable, lock GPT-5.5 baselines now, set automatic fallback, and budget $200–500 for evaluation when GPT-5.6 launches.

• •Only one confirmed fact: GPT-5.6 exists in OpenAI's Codex backend—a single rollout-mapping entry visible before rollback
• •All other specs (pricing, 1.5M context window, benchmark scores, exact release date) are unverified speculation from secondary sources
• •Practical actions: use environment variables for model names, lock GPT-5.5 baselines, set automatic fallback routing, budget $200–500 for first-week evaluation

Generated with AI, which can make mistakes.