OpenAI DevDay 2025: Everything Announced — Apps SDK, AgentKit, ChatKit, Codex, Sora 2 & GPT-5 Pro
TL;DR
- Apps SDK (Preview): Build native, interactive apps directly inside ChatGPT using MCP; developer submissions and monetization coming later.
- AgentKit: Visual, no-code agent builder with modular pipelines, guardrails (hallucination/prompt-injection), confidence thresholds, and human-in-the-loop approvals.
- ChatKit: Embeddable chat widgets, integrations, and eval tools to test conversational UX and quality.
- Codex updates: Stronger multi-modal coding support, including mobile app development paths.
- Models & API: Sora 2 (pro-grade video) and GPT-5 Pro start rolling out to DevDay attendees; platform focuses on lower latency, cost reductions, and enterprise governance for agentic workflows.
- Program highlights: Deep dives on agent orchestration and enterprise AI, "Sora Cinema” screenings, and a closing fireside chat between Sam Altman and Jony Ive.
Event Snapshot
OpenAI’s third DevDay centered on one theme: turning agents and in-chat apps into production-ready products. Beyond the keynote and live demos, the agenda included sessions on enterprise adoption, internal workflows, and hands-on areas to trial new tools—most notably, Sora Cinema for video generation showcases. The event wrapped with a fireside chat between Sam Altman and Jony Ive that re-ignited speculation about future AI-native hardware.
Developer Tools & Platforms
Apps SDK (Preview): Apps inside ChatGPT
OpenAI introduced an Apps SDK that lets developers craft native, interactive app experiences directly within ChatGPT. Built on the Model Context Protocol (MCP), the SDK enables:
- Adaptive UI in chat: Render forms, controls, and rich outputs inline.
- Personalization hooks: Pull user context (with permissions) for tailored experiences.
- MCP integrations: Connect custom data/tools without brittle glue code.
Availability: Developer preview now; broader submissions and monetization later this year.
AgentKit: Visual Agent Orchestration for Everyone
AgentKit brings a workflow-style canvas to agent development so non-engineers can ship useful automations safely:
- Visual pipelines: Drag-and-drop steps, tools, and branching logic.
- Guardrails: Built-in defenses against hallucinations and prompt injection.
- Confidence thresholds: Auto-route low-confidence outputs for review.
- Human-in-the-loop: Approval gates and escalation paths.
- Templates & prompt libraries: Reusable building blocks for common scenarios.
Goal: Democratize safe agent orchestration from support bots to research copilots without sacrificing governance.
ChatKit: Embeddable Chat + Evals
For teams shipping conversational experiences, ChatKit bundles:
- Chat widgets & SDKs for web/app embedding.
- Evaluation harnesses to test prompts, tool-use, and UX flows.
- Analytics hooks to measure quality, deflection, and satisfaction.
Codex Updates: Multimodal & Mobile-Ready
OpenAI’s coding stack gets a lift with improved code generation, stronger multimodal comprehension, and support targeting mobile app development paths—reducing the time from idea to prototype across editors, terminals, and CI.
API & Model Updates
Sora 2 and GPT-5 Pro in the API
- Sora 2: Professional-grade video generation with higher fidelity and controllability for storyboards, product shots, and creative sequences.
- GPT-5 Pro: Next-tier reasoning and tool-use for agentic workflows and enterprise-grade copilots.
Rollout: Initial access for DevDay attendees; broader availability to follow.
Platform Enhancements: Faster, Cheaper, Governable
- Lower latency & cost reductions across key endpoints to make agentic patterns economical at scale.
- Enterprise features: Auditability, role-based governance, and policy controls designed for regulated teams.
- Agent-scale support: Tracing, retries, and eval hooks built into the platform fabric.
OpenAI also signaled that select older model families (e.g., GPT-4.1, o3) may see price adjustments to improve accessibility, especially for startups and education.
What’s Available Now vs. Coming Soon
| Area | Available Now | Coming Soon |
|---|---|---|
| Apps SDK | Developer preview | App submissions & monetization, broader availability |
| AgentKit | Early features via preview components | Full visual canvas, expanded templates, admin governance rollouts |
| ChatKit | Widgets, integrations, eval tools | Deeper analytics & enterprise reporting |
| Codex | Upgraded coding experience | Additional multimodal/mobile enhancements |
| Models | Initial access to Sora 2 and GPT-5 Pro (DevDay cohort) | Wider API access tiers |
| Platform | Latency & cost improvements; governance scaffolding | Expanded audit, policy, and tracing features |
Why It Matters
DevDay 2025 marks a shift from raw model access to end-to-end building blocks:
- Distribution: Apps that live inside ChatGPT give developers an instant channel.
- Orchestration: AgentKit turns agent design into a governed, visual workflow.
- Reliability: ChatKit evals + guardrails help teams ship with confidence.
- Economics & Scale: Latency and pricing moves make agentic automation viable for startups and enterprises alike.
How to Get Started
- Prototype an in-chat app using the Apps SDK and MCP to connect your data/tools.
- Sketch an agent workflow in AgentKit (add approval gates for safety).
- Embed a support/chat widget with ChatKit and measure deflection & CSAT.
- Pilot Sora 2 or GPT-5 Pro on a limited use case; capture outcomes with evals.
