GPT-5.3-Codex
7 mentions across all digests
GPT-5.3-Codex is OpenAI's agentic coding model that competes directly with Claude Opus 4.6, with strengths in git operations and coding tasks, and pricing shifted to transparent token-based credits for Codex users.
Opus 4.6, Codex 5.3, and the post-benchmark era
[AINews] GPT 5.4: SOTA Knowledge Work -and- Coding -and- CUA Model, OpenAI is so very back
Introducing GPT-5.3-Codex
Mythos and Cybersecurity
Anthropic's Claude Mythos Preview weaponizes 181 Firefox exploits under restricted access to 50 vendors, but Schneier warns this may leave industrial and medical infrastructure dangerously undefended while skilled adversaries exploit the model elsewhere.
Codex is switching to API pricing based usage for all users
OpenAI replaces Codex's per-message pricing with transparent token-based credits, targeting typical developer costs of $100–200/month across all subscription tiers.