Microsoft has entered the decision model race, launching Microsoft-Decision-1 in Foundry on Friday. The model was post-trained on Alibaba's Qwen3.5-9B rather than OpenAI technology, and arrives three days after OpenAI opened its Decisions API to every developer and roughly three and a half weeks after startup TypeSafe created the category with Jev. Microsoft CEO Satya Nadella says the company is already testing the model across Microsoft.
Microsoft launched Microsoft-Decision-1 in Foundry on Friday, entering the fast-moving decision model category just three days after OpenAI opened its Decisions API to every developer in public beta and about three and a half weeks after startup TypeSafe created the category with its Jev model.
The model was post-trained on Alibaba's Qwen3.5-9B rather than technology from Microsoft's partner OpenAI, though Microsoft says it plans to rebase it soon on its own MAI models as well as OpenAI's.
Decision-1 costs $0.042 per million input tokens with free output, exactly the price TypeSafe charges for Jev. TypeSafe announced an $870 million Series A at a $7.5 billion valuation led by a16z the same day, and OpenAI, Upstage, Perplexity, Cloudflare and AWS have all shipped decision models of their own.
Microsoft's first customer is itself. Chairman and CEO Satya Nadella announced the model on X, writing: "Introducing Microsoft-Decision-1, our new model for fast decision-making. It delivers top performance on structured decision tasks, outperforming both LLMs and other decision models in latency and quality. We're already testing it across Microsoft for everything from incident..."
Four internal teams are using it. Xbox Research used it to sort more than 10,000 pieces of player feedback, the Copilot team graded chat and agent responses with it, on-call engineers used it to pull context during live incidents, and Microsoft Discovery used it to score experiments before an agent replans. Microsoft says Decision-1 is more than 14 times as fast as GPT-6 Sol at a fraction of the cost for Xbox, and 46 times more consistent in Discovery.
TypeSafe, meanwhile, says nearly 30% of the Fortune 500 has tried Jev, though it has not named any of them. CEO Diogo Almeida posted on X: "launched a model / accidentally served trillions of tokens a day / 29.4% of the fortune 500 showed up / raised a really big series A from @a16z / it's been 3 weeks / we would like to sleep now."
Analysis
Why This Matters
- Microsoft's launch validates a category that startup TypeSafe created barely three and a half weeks ago, and brings Azure distribution to a field that now includes OpenAI, AWS, Perplexity, Cloudflare and Upstage.
- Microsoft built on Alibaba's Qwen instead of its partner OpenAI's technology, and plans to rebase on both its own MAI models and OpenAI's, signalling how quickly this market is moving.
- Pricing is already at parity, with Decision-1 matching Jev at $0.042 per million input tokens with free output, setting up a contest over speed, price and enterprise trust.
Background
Decision models are a new category of AI systems aimed at fast, structured decision-making: triaging feedback, grading responses, pulling context during incidents, or scoring experiments, rather than open-ended chat. TypeSafe is credited with having started the category with Jev about three and a half weeks before Decision-1 shipped, and it has moved quickly: the same day Microsoft launched, TypeSafe announced an $870 million Series A at a $7.5 billion valuation led by a16z. Microsoft's choice of Alibaba's Qwen as the base model is notable given its long-standing partnership with OpenAI, which opened its own Decisions API to all developers three days before Microsoft's launch.
Key Perspectives
Microsoft: CEO Satya Nadella announced the model on X, calling it "our new model for fast decision-making" and saying it outperforms both LLMs and other decision models in latency and quality. Four internal teams are testing it, and Microsoft's own numbers claim large speed and consistency gains over GPT-6 Sol.
TypeSafe: CEO Diogo Almeida said "29.4% of the fortune 500 showed up" in the three weeks since Jev's launch, and the company says nearly 30% of the Fortune 500 has tried the model, although none have been named.
Competitors: OpenAI opened its Decisions API to every developer in public beta days before Microsoft's launch, and AWS, Perplexity, Cloudflare and Upstage have all shipped decision models, making this one of the most crowded new categories in AI.
Skeptics: Adoption claims rest on TypeSafe's own statements without named customers, and Microsoft's performance figures are internal measurements from its own teams, not independent benchmarks.
What to Watch
- Microsoft's promise to rebase Decision-1 on its MAI models and OpenAI's models, and any pricing changes that follow.
- Whether TypeSafe names its claimed Fortune 500 customers, which would test whether "29.4%" is real traction or marketing.
- The next wave of launches: with OpenAI, AWS, Perplexity, Cloudflare and Upstage all in the category within weeks, watch for consolidation, independent benchmarks or a price war.