OpenAI cuts GPT-5.6 Luna and Terra pricing
Frontier-model competition is moving from raw capability claims toward cost-per-task, latency, and how product quotas are counted.
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Logged at IST: 2026-07-31 10:05 IST
What it is: OpenAI announcing price and speed changes for GPT-5.6 Luna, Terra, and Sol across the API, Codex, and ChatGPT Work usage accounting.
Gist: OpenAI says GPT-5.6 Luna pricing is dropping by 80%, GPT-5.6 Terra by 20%, and GPT-5.6 Sol is getting a faster API option. The attached chart frames Luna as the highest-scoring model on Artificial Analysis Intelligence Index v4.1 while being much cheaper per task than other frontier models in the chart. The product detail that matters is not just API sticker price: OpenAI says the lower Luna and Terra prices also change how usage is counted in Codex and ChatGPT Work, so existing quotas stretch further.
Newsletter angle: Useful AI-infra/pricing item because the frontier-model race is increasingly about cost-per-task, latency, and quota mechanics, not only benchmark position. That matters for agent workflows where small differences in per-task economics quickly turn into large product and infrastructure tradeoffs.