Describe goals to complete cross-app tasks automatically Start natural voice conversations anytime with GPT-Live Get better work quality at lower cost Long tasks can move from draft to presentation more easily Track the latest safety rules for bigger models Translate naturally during calls, meetings, and travel Easily automate multi-step daily tasks at lower cost Make Claude easier to deploy through AWS Claude Fable 5 is usable again after the pause Keep research tools and analysis in one place Delegate more everyday coding work to Claude Measure how well AI agents handle ambiguous biology research judgments Claude Sonnet 5 is built for heavier coding and work tasks HP partnership makes enterprise rollout easier Tag Claude in Slack to delegate tasks with your whole team Hand Slack tasks to Claude more easily Confidential AI gets stronger for sensitive workloads Gemini API key management is moving to safer auth keys Claude expands more easily into Korean businesses and research Anthropic expands Claude adoption and research in Korea Describe goals to complete cross-app tasks automatically Start natural voice conversations anytime with GPT-Live Get better work quality at lower cost Long tasks can move from draft to presentation more easily Track the latest safety rules for bigger models Translate naturally during calls, meetings, and travel Easily automate multi-step daily tasks at lower cost Make Claude easier to deploy through AWS Claude Fable 5 is usable again after the pause Keep research tools and analysis in one place Delegate more everyday coding work to Claude Measure how well AI agents handle ambiguous biology research judgments Claude Sonnet 5 is built for heavier coding and work tasks HP partnership makes enterprise rollout easier Tag Claude in Slack to delegate tasks with your whole team Hand Slack tasks to Claude more easily Confidential AI gets stronger for sensitive workloads Gemini API key management is moving to safer auth keys Claude expands more easily into Korean businesses and research Anthropic expands Claude adoption and research in Korea

Official sources only. Rumors, leaks, and get-rich schemes are excluded.

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AI BriefingOpenAIFeature Updates19:29

AI summarized from verified sources

OpenAI Launches GPT-5.3-Codex for Advanced Coding Agents

Process coding tasks faster and cheaper, enabling easier agentic development.

SOURCE CHECK

2 sources

VERIFIED

Sources

Primary / x.com

Official Docs

Supporting / developers.openai.com

Official Docs

Key Points

1Supports 400,000 token context length
2Maximum output of 128,000 tokens with streaming and function calls
3Pricing: $1.75 per 1M input, $14 per 1M output tokens
4Available across various APIs including Chat Completions

OpenAI released GPT-5.3-Codex for developers via Responses API and others. It delivers 25% faster processing with improved token efficiency and adjustable reasoning from low to extra-high complexity, handling complex coding efficiently.

What changed

OpenAI released GPT-5.3-Codex for developers via Responses API and others. It delivers 25% faster processing with improved token efficiency and adjustable reasoning from low to extra-high complexity, handling complex coding efficiently.

Why it matters

Process coding tasks faster and cheaper, enabling easier agentic development.

What to watch

Process coding tasks faster and cheaper, enabling easier agentic development. Key checks: Supports 400,000 token context length / Maximum output of 128,000 tokens with streaming and function calls / Pricing: $1.75 per 1M input, $14 per 1M output tokens.