Hi everyone, I’m writing to report a significant spike in 503 (Service Unavailable) errors while using the Gemini API lately. I’ve noticed a few specific patterns: Across all models: This isn’t isolated to one specific version. Im trying Gemini 3 Flash Preview and Gemini 2.5 Flash. Not a Rat…

Hello Everyone, so sorry you’re still experiencing this. We have some guidance on using retries in this pinned post on 503’s / 429’s

Will this solve the Google Antigravity issues too? All models error out on nearly every message, and even while running steps. Not sure if failed requests count towards the quota either, but even with a Google AI for Business Ultra plan, haven’t been able to use it for days (Sonnet, Opus, Gemini Pro…

Thanks Logan! Appreciate the update. I’ve noticed the 503s are happening less, I’ve also noticed some different behavior across the thinking traces. Looks like a model update was recently rolled out for the gemini-3-flash-preview endpoint?

Gemini-3-pro-preview is occasionally available, but Gemini-3-pro-image-preview is unavailable for the whole day.

Currently we feel mostly API slowness, and less if any 503 (great work on reducing those, Gemini team!) But the slowness is still a showstopper - prompts that used to take 15-30 seconds now take upwards of 10-15min at times. This also affects Gemini CLI.

Errors 503 all day! And even errors 429 with Vertex AI! I am losing customers. What the hell is going on?? It’s not even peak US time.

I have to basically shutdown all my app because Gemini is unreliable! Losing potential revenue.

Same here. Been having the problems for at least 7h.

I’m having the same problem. I don’t mind that it is down, I completely understand that it is something that can happen but please reflect that in a public status page or something like that. The Google AI Studio doesn’t say anything. Not sure if there is another status page.

I’m having the same problem today. Anyone else?

Frequent 503 Errors (Service Unavailable) across all models

Gemini API

Quentin_D January 28, 2026, 3:17pm 31

Oui. En effet, beaucoup trop d’erreur 503 aujourd’hui. Et pour le peu de génération d’images qui fonctionnent, on a l’impression que le système est limité et la qualité n’est pas au rendez-vous.

Topic		Replies	Views
Gemini 3 Pro Image Preview returning persistent 503 errors despite enabled billing Gemini API api , production , gemini , image-generation	12	758	January 30, 2026
[503] This model is currently experiencing high demand. Spikes in demand are usually temporary. Please try again later Gemini API model	32	5548	June 13, 2026
Gemini 3.1 Pro Preview API requests failing/timing-out Gemini API api , gemini , gemini-3	13	2071	March 5, 2026
Tier 3 Project – Persistent 503 & 429 Errors in Production (No Communication / Need ETA) Gemini API api	9	282	May 19, 2026
Getting a lot of "service unavailable" errors on gemini-2.0-flash Gemini API api , gemini-flash , gemini-20	21	1828	November 7, 2025

Frequent 503 Errors (Service Unavailable) across all models

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