GPT-5.3-Codex System Card
GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2.
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GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2.
GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.
Learn how to embed the Codex agent using the Codex App Server, a bidirectional JSON-RPC API powering streaming progress, tool use, approvals, and diffs.
URLs in build logs are now interactive. Navigate directly to internal and external resources without manually copying and pasting. External links open in a new tab. This eliminates any extra steps you may encounter when investigating build issues or following documentation links. Learn more about accessing .build logs Read more
You can now use LLM-optimized web search and other tools all across Vercel.Parallel's Unlike provider-specific web search tools that only work with certain models, Parallel's web search tool works universally across all providers. This means you can add web search capabilities to any model without changing your implementation. To use through AI SDK, set in parallel_search: gateway.tools.parallelSearch()tools. Parallel web search extracts relevant excerpts from web pages, making it ideal for ag
is now available on the with native integration support.ParallelVercel Agent Marketplace Parallel provides web tools and agents designed for LLM-powered applications, including Search, Extract, Tasks, FindAll, and Monitoring capabilities. The Vercel integration provides a single API key that works across all Parallel products, with billing handled directly through your Vercel account. For developers building AI features on Vercel, Parallel enables agents to access the open web for tasks like an
New reference documentation is now available for AI Crawl Control: GraphQL API reference — Query examples for crawler requests, top paths, referral traffic, and data transfer. Includes key filters for detection IDs, user agents, and referrer domains. Bot reference — Detection IDs and user agents for major AI crawlers from OpenAI, Anthropic, Google, Meta, and others. Worker templates — Deploy the x402 Payment-Gated Proxy to monetize crawler access or charge bots while letting humans through free.
Cloudflare Queues is now part of the Workers free plan, offering guaranteed message delivery across up to 10,000 queues to either Cloudflare Workers or HTTP pull consumers. Every Cloudflare account now includes 10,000 operations per day across reads, writes, and deletes. For more details on how each operation is defined, refer to Queues pricing. All features of the existing Queues functionality are available on the free plan, including unlimited event subscriptions. Note that the maximum retenti
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