Agent platform race: Cursor and OpenAI coordinators, Atlassian, AWS, Cloudflare, Moonshot, Antigravity
Between 21 and 25 September, several players released new agent tools: Atlassian introduced always-on agents, AWS an open-source agent (45% cheaper than Claude Code and Codex, by its own claim), and Cloudflare the Agent Development Lifecycle. Moonshot launched a desktop Kimi Code, and the Antigravity SDK gained local model support, while OpenAI and Cursor differ on agent coordinators.
Who is affected and how
- CTO
- The vendor landscape is splitting quickly, so consider an open, swappable agent layer.
- tech lead
- Assess cheaper or local-model options on your own tasks.
- senior developer
- Try at least one alternative agent alongside your current one.
Sources
- OpenAI and Cursor agree on agent coordinators. They disagree on who runs them. · DevFeeddevfeed.tech · Sep 25, 2026
- OpenAI and Cursor agree on agent coordinators. They disagree on who runs them. - The New Stackthenewstack.io · Sep 25, 2026
- Atlassian Launches Always-On AI Agents for Software Development | Software Curatedsoftwarecurated.com · Sep 22, 2026
- AI Agents in 2027: The Future of Software Developmentgraygaps.com · Sep 25, 2026
- AWS open-sources an AI agent it says is 45% cheaper than Claude Code and Codexthe new stack · Sep 21, 2026
- Claude Code vs Codex CLI vs Gemini CLI: Which AI Coding Agent Fits Your Workflow? | Stackademicstackademic.com · Sep 23, 2026
- Cloudflare Introduces the Agent Development Lifecycle Stack to Replace Traditional SDLC - InfoQinfoq.com · Sep 21, 2026
- Moonshot Launches Kimi Code Desktop Version: Three Modes - Plan, Goals, and Swarm Introduced, Bringing AI Programming to the Graphical Interfacenews.aibase.com · Sep 22, 2026
Machine-generated summary based on the titles and excerpts of the source articles. The facts come from the linked article.