OpenAI rolls out GPT-6 with Intelligent UI in ChatGPT
GPT-6 is rolling out globally inside ChatGPT and introduces an "Intelligent UI" that delivers faster responses along with visuals and interactive experiences you can explore and use directly.
MODEL · ENTITY #6599
GPT-6 Luna
Related event timeline, sources and context from the news index.
EVENT TIMELINE
7Anthropic launches Claude Haiku 5.5 with big price cuts and benchmark gains
Anthropic released Claude Haiku 5.5, a faster, lower‑cost small model aimed at high‑volume tasks; Anthropic says Haiku 5.5 costs ~75% less on average than Haiku 4.5 and up to 90% less for prompts ≤100,000 tokens. The company also halved Sonnet 5.5 cache‑read costs, added monthly API credits for subscribers, updated SDKs with beta computer/browser use, and says Haiku 5.5 outperforms its predecessor (and compares favorably to OpenAI’s GPT‑6 Luna) on several benchmarks and agentic coding tests.
OpenAI expands Codex at DevDay with Codex Security Cloud, Decisions API (GPT-6 Luna), and Ultrafast
At DevDay 2026 OpenAI announced multiple Codex updates including reusable cloud development environments, a voice-controlled CLI, a code review view in the ChatGPT desktop app, and Codex Security Cloud to scan repositories and prepare fixes. It also launched a Decisions API (limited preview) built on GPT‑6 Luna for fast classification/decisions, added Computer Use to the Agents API, and introduced an Ultrafast premium speed tier (available for GPT‑6 Astra on Enterprise and Pro 500 plans; reported at six times the standard rate).
OpenAI reopens $200 Pro plan but halves API credits per dollar
OpenAI is reopening its $200-per-month Pro subscription to new sign-ups while cutting the amount of API credits granted per dollar by half; the previous 5-hour usage cap for subscribers has been removed. Employee Thibault Sottiaux cited recent releases—GPT-6 Sol and GPT-6 Luna, reportedly released this week at half the API price of predecessors—and framed the changes as a shift toward pay‑per‑use pricing.
Epoch AI: cost to reach fixed benchmark scores fell ~47% per quarter; MIT finds smaller algorithmic gains (~3x/yr)
Epoch AI reports that market prices to achieve fixed scores on five AI benchmarks fell about 47% per quarter (≈13x/year) since 2023, citing examples like OpenAI's o3 vs GPT-5.6; the group warns its sample is limited and measures market price per benchmark score rather than pure algorithmic progress. MIT researchers (Hans Gundlach et al.) using broader model pricing data find 5–10x annual declines in benchmark cost but estimate actual algorithmic efficiency gains of ~3x/year after removing hardware and competition effects, and note some improvements come from higher test‑time compute rather than efficiency.
ChatGPT Voice moves to GPT‑6 Astra/Sol/Luna and gains email, calendar, Slack access
OpenAI's globally available ChatGPT Voice now runs on the new GPT‑6 Astra, Sol, and Luna models and can, for the first time, access plugins such as email, calendar, and Slack to perform tasks by voice. Voice functionality is also available in ChatGPT Work on web and mobile, letting users create documents, presentations, and spreadsheets via speech; the update is included in the latest app release.
OpenAI's GPT-6 Sol and GPT-6 Luna now generally available on Amazon Bedrock
OpenAI's GPT-6 Sol and GPT-6 Luna are now generally available on Amazon Bedrock, running on Bedrock's high-performance inference engine and offered at lower API pricing than their GPT-5.6 predecessors. GPT-6 Sol is positioned for demanding, recurring development and operations tasks with improved coding, reasoning and factuality (OpenAI reports ~50% fewer factual mistakes vs GPT-5.6 Sol), while GPT-6 Luna is optimized for high-volume, repeatable workloads like extraction, classification and summarization; Bedrock supports explicit prompt caching plus IAM-based access control and invocation auditing.