The newest GPT Terra model is GPT-5.6 Terra, released on July 9, 2026. Until GPT-5.4 mini (March 2026), OpenAI called this tier “mini”. It has been 107 days since then and the line's usual gap is 114 days, so by its own rhythm the next GPT Terra model is due.
How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: GPT-5.6 Terra · Jul 9, 2026
Every Monday, only when something shipped: the AI models that came out, what each one changed, and which lines are due next.
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Newest first — what each version changed versus the one before, in OpenAI's own numbers.
A small GPT-4o model for developers at $0.15 / $0.60 per 1M tokens, with a 128,000-token context window.
GPT-3.5 Turbo brought the model behind ChatGPT to OpenAI's API at $0.002 per 1K tokens, 10x cheaper than OpenAI's existing GPT-3.5 models.
Compared with GPT-3.5 · comparison chosen by OpenAI
Costs developers a tenth as much as OpenAI's earlier GPT-3.5 models
Price per 1M tokens — what developers pay, input / output
$2 / $2
▲ launch price, $0.002 per 1K tokens · 10x cheaper than OpenAI's existing GPT-3.5 models