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batchwatchGoogle › gemini-2.5-flash

How long does gemini-2.5-flash batch take at Google?

Measured, not promised. Google publishes a completion window of 24 hours and nothing more precise; below is what 238 real batch jobs actually did.

Measured over the last 30 days
Nine in ten finished within 5 min
Half finished within 2 min. The slowest job we measured took 14 min.
p502 min
Measurements238
Sources1
p905 min
p957 min

What we measured

p502 minhalf finished within
Measurements23830-day window
Sources1independent contributor
p905 minnine in ten
p957 minnineteen in twenty

Every measured job, slowest last

Share of jobs finished, against elapsed time. 238 completions, 30-day window.

0s 7 min 14 min 0%25%50%75%90%100% share of jobs finished

The curve is drawn from the pooled measurements, while the headline percentiles above are the median of each contributor's own figures - so the two need not line up exactly. That is deliberate: no single source can move a headline number by sending more data.

What you can plan for

6 min

Upper end of the measured interval

Plan for 6 min. That is the upper end of a 90% confidence interval around the p90, computed from the measurements themselves. It is deliberately not the median: being wrong toward synchronous costs twice the money, being wrong toward batch can miss a deadline, and those two mistakes are not equally expensive.

The slowest job we actually observed took 14 min. That is one job, not a bound.

How much this answer is worth

Confidence: Low

Score 0.47 · basis: exact_model

Based on a single contributor, a figure pooled across contributors (not yet a per-contributor median), nothing measured for 6 days.

Pooled across every measurement we have. As more contributors each build their own track record, this figure sharpens into a per-contributor median.

Where the numbers come from

Each measurement is one completed batch job. The duration is end minus start, both timestamped by our server - a client can never submit a duration, and a job we stopped waiting for is recorded as abandoned, never as a fast completion.

Newest measurement2026-08-21T02:39:28.000Z
Oldest in window2026-08-14T11:51:37.000Z
Figures computed2026-08-27T09:40:58.000Z
Public delay15 minutes
Percentile methodpooled (1 voting source)

Timestamps are absolute and in UTC on purpose: this page may be cached, and a relative age would quietly go stale in the cache while an absolute one stays true.

Get this as JSON

Same numbers, same delay, no key required.

curl "https://batchwatch.dev/v1/curve?provider=google&model=gemini-2.5-flash"

Contributing five measurements in seven days cuts the delay to five minutes and unlocks the decision endpoints (/v1/should-i-batch, /v1/estimate-batchtime). Start on the front page.