Amazon is opening the gates to OpenAI’s Codex and Anthropic’s Claude Code for its own engineers, a sharp reversal from the November memo that pushed everyone toward its in-house tool Kiro. According to Futurism AI, VP of software builder experience Jim Haughwout told staff that Claude Code is available now, with Codex landing next week. Both will run through Amazon Bedrock, the company’s managed AWS layer for frontier models.
This is a meaningful climbdown. Six months ago, Amazon told employees flat out: “While we continue to support existing tools in use today, we do not plan to support additional third party, AI development tools.” The message was clear. Use Kiro. Now engineers get the competitors they were asking for.
What changed
Futurism AI reports that internal pressure had been building for months. Developers were frustrated with the limits Amazon placed on Claude Code, especially given the optics. AWS sells Bedrock access to outside customers running Claude and other frontier models, while Amazon’s own engineers were boxed out.
One employee comment captured the contradiction: “Customers will ask why they should trust or use a tool that we did not approve for internal use.”
That’s a hard question to answer when you’re trying to sell a platform.
Why this matters
- Amazon is one of the biggest AI investors on the planet. It has poured tens of billions into Anthropic and has deep ties with OpenAI partners. Forcing engineers off those tools while bankrolling them was always going to be hard to defend.
- Kiro isn’t keeping pace. Anthropic and OpenAI are in a head-to-head sprint for the coding agent crown, and Futurism AI frames Amazon’s reversal as a quiet admission that its flagship tool can’t match what the competition ships.
- AI-generated code has already burned Amazon. The company has acknowledged that recent outages traced back to poorly implemented AI-generated code, which makes the tool choice question even more pointed for internal teams.
- Bedrock is the face-saver. Routing Claude Code and Codex through Bedrock lets Amazon keep the security story intact and push customers toward the same path. It’s not a full surrender. It’s a managed retreat.
The spin
An Amazon spokesperson told Business Insider, which Futurism AI cites, that teams are still “primarily using” Kiro, with the company claiming 83 percent of engineers rely on it. Take that number with the usual corporate seasoning. The fact that leadership felt forced to open access at all says more than the percentage does.
What to watch next
For practitioners, three things are worth tracking:
- Bedrock adoption curves. If Amazon’s own engineers shift heavily to Claude Code and Codex through Bedrock, expect that signal to ripple into AWS sales pitches.
- Kiro’s roadmap. Does Amazon double down on its own tool, reposition it, or quietly let it fade? The answer tells you how seriously to take any future first-party AI coding pitch from a hyperscaler.
- Pressure on Microsoft and Google. Both run their own coding tools while also hosting competitors. Amazon just blinked. Watch whether the others hold the line or follow.
The broader takeaway: in AI coding tools, customer pull is beating corporate mandates. Even at Amazon’s scale, you can’t tell engineers to use the second-best option when the best is sitting right there on your own cloud.
Full reporting at the original source.