Gemini 2.5 Flash will allow developers to set a token limit for thinking or simply disable thinking altogether.
Google has provided pricing per 1 million tokens at $0.15 for input, and output comes in two flavors.
Without thinking, outputs are $0.60, but enabling thinking boosts it to $3.50.
The thinking budget option will allow developers to fine-tune the model to do what they want for an amount of money they're willing to pay.
According to Doshi, you can actually see the reasoning improvements in benchmarks as you add more token budget.
2.5 Flash outputs get better as you add more reasoning tokens.
Credit: Google 2.5 Flash outputs get better as you add more reasoning tokens.
Credit: Google Like 2.5 Pro, this model supports Dynamic Thinking, which can automatically adjust the amount of work that goes into generating an output based on the complexity of the input.
The new Flash model goes further by allowing developers to control thinking.
According to Doshi, Google is launching the model now to guide improvements in these dynamic features."Part of the reason we're putting the model out in preview is to get feedback from developers on where the model meets their expectations, where it under-thinks or over-thinks, so that we can continue to iterate on [dynamic thinking]," says Doshi.Don't expect that kind of precise control for consumer Gemini products right now, though.
Doshi notes that the main reason you'd want to toggle thinking or set a budget is to control costs and latency, which matters to developers.
However, Google is hoping that what it learns from the preview phase will help it understand what users and developers expect from the model.
"Creating a simpler Gemini app experience for consumers while still offering flexibility is the goal," Doshi says.With the rapid cadence of releases, a final release for Gemini 2.5 doesn't seem that far off.
Google still doesn't have any specifics to share on that front, but with the new developer options and availability in the Gemini app, Doshi tells us the team hopes to move the 2.5 family to general availability soon.