When I test the AI Gateway with stream: true, the response is not delivered in a real-time streaming

When I test the AI Gateway with stream: true, the response is not delivered in a real-time streaming fashion. Instead, the output only appears all at once after the upstream service finishes processing. In other words, even though I set "stream": true and use Accept: text/event-stream, the gateway buffers the response and returns it all at once instead of streaming it incrementally.

Here’s the sample code I used for testing:

curl -N -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/compat/chat/completions \
  --header 'Authorization: Bearer {GOOGLE_GENERATIVE_AI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --header 'Accept: text/event-stream' \
  --header 'Cache-Control: no-cache' \
  --data '{
    "model": "google-ai-studio/gemini-2.0-flash",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ],
    "stream": true,
    "temperature": 0.7,
    "max_tokens": 1000
  }' | while IFS= read -r line; do
    echo "[$(date '+%H:%M:%S.%3N')] $line"
  done

curl -N -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/compat/chat/completions \
  --header 'Authorization: Bearer {GOOGLE_GENERATIVE_AI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --header 'Accept: text/event-stream' \
  --header 'Cache-Control: no-cache' \
  --data '{
    "model": "google-ai-studio/gemini-2.0-flash",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ],
    "stream": true,
    "temperature": 0.7,
    "max_tokens": 1000
  }' | while IFS= read -r line; do
    echo "[$(date '+%H:%M:%S.%3N')] $line"
  done

curl -N -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/compat/chat/completions \
  --header 'Authorization: Bearer {GOOGLE_GENERATIVE_AI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --header 'Accept: text/event-stream' \
  --header 'Cache-Control: no-cache' \
  --data '{
    "model": "google-ai-studio/gemini-2.0-flash",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ],
    "stream": true,
    "temperature": 0.7,
    "max_tokens": 1000
  }' | while IFS= read -r line; do
    echo "[$(date '+%H:%M:%S.%3N')] $line"
  done

curl -N -X POST https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/compat/chat/completions \
  --header 'Authorization: Bearer {GOOGLE_GENERATIVE_AI_API_KEY}' \
  --header 'Content-Type: application/json' \
  --header 'Accept: text/event-stream' \
  --header 'Cache-Control: no-cache' \
  --data '{
    "model": "google-ai-studio/gemini-2.0-flash",
    "messages": [
      {
        "role": "user",
        "content": "What is Cloudflare?"
      }
    ],
    "stream": true,
    "temperature": 0.7,
    "max_tokens": 1000
  }' | while IFS= read -r line; do
    echo "[$(date '+%H:%M:%S.%3N')] $line"
  done

Could you confirm if AI Gateway currently supports real-time streaming passthrough, or if it’s expected behavior that the response is buffered and only returned once the upstream completes?

Acterion•9/27/25, 5:32 PM

New to AI gateway
Trying to set it up with direct connection with OpenWeb-UI hosted on my subdomain (using CF tunnel to my own infra) and constatnly getting CORS errors when sending OPTIONS request to /completions endpoint. Seems like CF either dropping Allow-Cross-Origin headers or/and not working correctly with OPTIONS requests.
Did anyone had success configuring OpenWebUI to work with Gateway before?

mongj•9/28/25, 7:16 AM

hey does anyone know if the AI gateway supports sending audio files in a multi-part form request for STT models like whisper?

I was testing out the groq endpoint but consistently got 400s for valid audio files. URL input seems to work correctly.

mongj•9/28/25, 7:16 AM

here's a basic request I tested with

curl -X POST https://gateway.ai.cloudflare.com/v1/<cloudflare-acco
unt-id>/<gateway-name>/groq/audio/transcriptions \
  -H "Content-Type: multipart/form-data" \
  -H "Authorization: Bearer <token>" \
  -F "model=whisper-large-v3-turbo" \
  -F "file=@/path/to/audio.mp3"

curl -X POST https://gateway.ai.cloudflare.com/v1/<cloudflare-acco
unt-id>/<gateway-name>/groq/audio/transcriptions \
  -H "Content-Type: multipart/form-data" \
  -H "Authorization: Bearer <token>" \
  -F "model=whisper-large-v3-turbo" \
  -F "file=@/path/to/audio.mp3"

mongj•9/28/25, 7:16 AM

and the response

{"error":{"message":"could not process file - is it a valid media file?","type":"invalid_request_error"}}

{"error":{"message":"could not process file - is it a valid media file?","type":"invalid_request_error"}}

mongj•9/28/25, 7:16 AM

Using a url pointing to an uploaded version of the same audio file works as intended.

CodingCoop | Co-Founder Nullshot•9/28/25, 1:04 PM

How can I get access to this - applied a few weeks ago and no response.

About to lean into open router but would love to partner:

https://blog.cloudflare.com/ai-gateway-aug-2025-refresh/

wondering if joining the startup program would help push this through?

The Cloudflare Blog

AI Gateway now gives you access to your favorite AI models, dynamic...

AI Gateway simplifies AI app development with unified billing, secure key storage, and dynamic routing. Gain observability and control over costs, API keys, and traffic, connecting to major AI providers through a single endpoint.

Leszek•9/29/25, 7:14 AM

Hey, I've created my first AI Search instance, with AI Gateway where I added the OpenAI key.
I've added my first document and I get an

error

error

while building embeddings during the sync.

I've chosen an OpenAI embedding model. The error I am getting is about missing token... It appears, AI Search is not using the token I have provided within the AI Gateway.

{
  "error": {
    "message": "You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://platform.openai.com/account/api-keys.",
    "type": "invalid_request_error",
    "param": null,
    "code": null
  }
}

{
  "error": {
    "message": "You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://platform.openai.com/account/api-keys.",
    "type": "invalid_request_error",
    "param": null,
    "code": null
  }
}

LLeszek Hey, I've created my first AI Search instance, with AI Gateway where I added the...

misterPaul•9/29/25, 11:26 AM

have you set up "Authenticated Gateway" on the settings page and passed the token in the cf-aig-authorization header as a bearer token

misterPaul•9/29/25, 11:38 AM

Go to your AI Search instance > Settings > Models. Is the Gateway field pointing to the correct AI Gateway where you stored the key?
In that specific AI Gateway, under "Provider Keys", is the OpenAI key definitely there and valid?

Those are the two obvious things to check, after that check the "Authenticated Gateway" setting I mentioned

Leszek•9/29/25, 11:46 AM

ave you set up "Authenticated Gateway" on the settings page

yes

and passed the token in the cf-aig-authorization header as a bearer token

no. I found no place for that.

I checked again right now and everything works.... So I guess it was an issue on the Cloudflare side.

Thank you for your help!

.r20•9/29/25, 5:39 PM

not sure if this is a bug but ai gateway created datasets dont support using metadata filters

.r20•9/29/25, 5:39 PM

dave•9/30/25, 3:57 PM

If I update a Secret Store value that's managed by AI Gateway, should that work?

Nnoway5566 When I test the AI Gateway with stream: true, the response is not delivered in a...

Brandon Studio•10/1/25, 11:44 AM

Same issue here. Could anyone help?

Brandon Studio•10/1/25, 11:44 AM

I have a video record

Nnoway5566 When I test the AI Gateway with stream: true, the response is not delivered in a...

dave•10/1/25, 10:14 PM

This is a regression afaik, iirc @Kathy might remember we talked about it and I think there was an internal ticket?

Aac We are having issues where OpenAI requests are now getting blocked because they ...

sarme•10/2/25, 5:15 PM

Same this happened to us sudden 18% error rate with 0 transparency over which worker location was involved. Also saw it in Hackernews today.

cosbgn•10/3/25, 8:33 AM

What kind of rate limits apply when using unified billing on a partner provider, e.g. sonnet 4.5?

cosbgn•10/3/25, 8:34 AM

I think by default anthropic has something like 60 requests per minute, but I woudn't be using my own api key as I would use the gateway-billing

cosbgn•10/3/25, 8:35 AM

So I'm wondering if I can safely move all my traffic there and cloudflare will automatically use another api key if one hits a limit

Zetax•10/4/25, 7:08 PM

Does Cloudflaare AI gateway allow me to call workers ai from any application? If not, that would be such a great feature

ElishaKay•10/8/25, 7:10 AM

Am I supposed to get logs of ai-search within API gateway?

I'm only seeing logs of my embedding calls - but not on my llm_completion (inference) calls

muhtasim•10/8/25, 8:46 AM

how to get llm usage (neuron) via api?

stephen•10/8/25, 9:27 PM

AI Gateway BYOK Issue: Google Vertex AI Imagen Authentication Fails
Problem
Cloudflare AI Gateway's BYOK (Provider Keys) feature successfully authenticates third-party Vertex AI models (Mistral) but fails to authenticate Google's native models (Imagen), despite using the same service account configuration.

---

What Works

Mistral OCR via AI Gateway BYOK:

await env.AI.gateway("my-gateway").run({
provider: "google-vertex-ai",
endpoint: "v1/projects/my-project/locations/us-central1/publishers/mistralai/models/mistral-ocr-2505:rawPredict",
query: { model: "mistral-ocr-2505", document: {...} }
})
//

200 OK - Works perfectly

---

What Fails

Imagen 4 via AI Gateway BYOK:

await env.AI.gateway("my-gateway").run({
provider: "google-vertex-ai",
endpoint: "v1/projects/my-project/locations/us-central1/publishers/google/models/imagen-4.0-generate-001:predict",
query: {
instances: [{ prompt: "test image" }],
parameters: { sampleCount: 1 }
}
})
//

401 from Google: "CREDENTIALS_MISSING"

---

Configurations Tried

Service account has Vertex AI User IAM role

Added "region": "us-central1" to service account JSON

Tested both :predict and :rawPredict endpoints - both fail

Verified credentials work when calling Vertex AI directly
---

Observation
Third-party publishers (publishers/mistralai/): BYOK authentication works
Google publishers (publishers/google/): BYOK authentication fails

The AI Gateway appears to not generate or pass OAuth2 credentials correctly for Google's native Vertex AI models.

---

Question: Is this a known limitation of BYOK with Google Vertex AI native models, or should this be working?

Sstephen AI Gateway BYOK Issue: Google Vertex AI Imagen Authentication Fails Problem Clou...

Marco Ancona•10/8/25, 9:53 PM

Not only Vertex. In the last 4 hours, we saw that all requests to Google AI Studio BYOK via AI Gateway are failing with the error "400 API key not valid. Please pass a valid API key."

We tried to generate a new key and tested the key locally, confirming it works. Still, the error occurs when running via AI Gateway.

Calls to OpenAI via AI Gateway work.

Marco Ancona•10/9/25, 7:01 AM

Is there any way to report a problem with a ticket to Cloudflare rather than just posting to void here?

MMarco Ancona Is there any way to report a problem with a ticket to Cloudflare rather than jus...

Peps•10/9/25, 12:33 PM

?support

SuperHelpflare•10/9/25, 12:33 PM

To contact Cloudflare Support about an issue, please visit the Support Portal and fill in the form on the portal. After submission, you will receive confirmation over email.

Some issues, such as Account or Billing related issues, cannot be solved by the community.
Any plan level (including Free plans) can open tickets for Account, Billing or Registrar ticket categories. Make sure to select the correct category to ensure it goes to the right place.
For more information on the methods by which you can contact Support for your plan level, see Contacting Cloudflare Support - Cloudflare Docs

Sstephen AI Gateway BYOK Issue: Google Vertex AI Imagen Authentication Fails Problem Clou...

stephen•10/9/25, 3:08 PM

My workaround:

Initial attempt (failed):

Provider: google-vertex-ai
Issue: Cloudflare AI Gateway BYOK doesn't support Vertex AI's Imagen endpoints (:predict or :rawPredict on
publishers/google/models/*)
Only Mistral models work with BYOK on Vertex AI (:rawPredict on publishers/mistralai/models/*)Working solution:
Provider: google-ai-studio
Model: imagen-4.0-generate-001:predict
Why it works: Google AI Studio is a separate provider that Cloudflare AI Gateway supports with BYOK, and Imagen 4 isavailable through itKey insight: Even though both Vertex AI and Google AI Studio host the same Imagen 4 model, AI Gateway's BYOK only works with Google AI Studio for Imagen, not Vertex AI. This is likely because they use different authentication mechanisms (Vertex uses service account JSON, AI Studio uses simple API keys).

SmallShen•10/9/25, 4:11 PM

Any plan on support openai responses api?

Razmjoo•10/9/25, 8:44 PM

Hi, is there any way to use @cf/tomarkdown@cf/tomarkdown / @cf/markdown@cf/markdown using the AI Gateway?

misterPaul•10/10/25, 12:08 AM

love the velocity of new changes, re: overview section quick CSS update will make this section more usable - see screenshots

min-h with calc vh is a bit funky, but I don't think there's another way to achieve a decent height on this element without this, or a layout refactor. Making the code section bigger is the ultimate objective.

misterPaul•10/10/25, 12:09 AM

End result below - much more high impact

These CSS fixes brought to you by an LLM executed through AI Gateway

misterPaul•10/10/25, 12:11 AM

This overview section is big value btw so thanks for adding; implementing AI Gateway with just the documentation was quite a challenge for a new user

Anton•10/13/25, 8:54 PM

I setup an agent based on the agent-starter template backed by openai's "gpt-4o" model which is working fine. Then I tried setting up AI Gateway by adding the …/compat…/compat-baseURL and updating the model name to "openai/gpt-4o". However I'm now getting 500 internal server errors with AI Gateway and don't see those requests in the dashboard.
Works without AI Gateway:

const openai = createOpenAI({
  apiKey: env.OPENAI_API_KEY,
  // baseURL: env.GATEWAY_BASE_URL,
});
const model = openai("gpt-4o");

const openai = createOpenAI({
  apiKey: env.OPENAI_API_KEY,
  // baseURL: env.GATEWAY_BASE_URL,
});
const model = openai("gpt-4o");

Fails with AI Gateway:

const openai = createOpenAI({
  apiKey: env.OPENAI_API_KEY,
  baseURL: env.GATEWAY_BASE_URL,
});
const model = openai("openai/gpt-4o");

const openai = createOpenAI({
  apiKey: env.OPENAI_API_KEY,
  baseURL: env.GATEWAY_BASE_URL,
});
const model = openai("openai/gpt-4o");

Checking the logs on the worker/do, it turns out, it's calling …/compat/responses…/compat/responses with AI Gateway enabled, which fails. Shouldn't this be calling…/compat/chat/completions…/compat/chat/completions (works via curl)?

Kepro•10/14/25, 8:17 AM

Hello, is streaming working for you when using the AI Gateway? I found just some posts here and here but no response from CF

KKepro Hello, is streaming working for you when using the AI Gateway? I found just some...

Brandon Studio•10/15/25, 1:52 AM

I think the last reply is ai-gateway

Ddave This is a regression afaik, iirc @Kathy might remember we talked about it and I ...

Kepro•10/15/25, 7:08 AM

Hello @dave | ai.moda and @Kathy | Browser Rendering PM , is there any update on this? It’s kind of a blocker for us right now

Thank you

WWard Hey all, is there an easy way to store my keys in the cloudflare dashboard and t...

engnadeau•10/15/25, 12:40 PM

@Ward did you figure out a solution to this issue?

engnadeau•10/15/25, 12:59 PM

Does Cloudflare AI Gateway BYOK actually support the OpenAI SDK?

I’m testing BYOK (“Store Keys”) with the Cloudflare AI Gateway using the OpenAI JS SDK. The docs only show curl examples, but the SDK always requires an apiKey.

If I omit it → Missing credentials.
If I include a dummy key → 401 Authorization Required

The docs say that BYOK Gateway should expect only cf-aig-authorization

Can someone from CF confirm whether BYOK is officially supported with the OpenAI SDK / Unified API, or if it’s currently curl-only?

alkgaming•10/17/25, 2:05 PM

Strazarachne•10/17/25, 2:16 PM

Is there an up to date list on regions or networks by prefix not allowed through cloudflare front end proxy currently that services chatgpt.com?

sodepr•10/17/25, 7:05 PM

I’ve seen several posts mentioning that Cloudflare AI Gateway routes requests to restricted regions, causing some APIs to stop working. Has this issue been resolved yet?

Oozan How can I use Vercel AI SDK with BYOK? In my createOpenAI call if I don't pass a...

Kris•10/18/25, 5:01 PM

Did you figure this out? I'm seeing the same thing with Anthropic. My workaround are to either include the API key at source (which won't work once we move to unified billing) or use the Cloudflare AI Gateway provider for the Vercal AI SDK (haven't tried yet, but expecting it might not work quite as well as the native provider).

Eengnadeau **Does Cloudflare AI Gateway BYOK actually support the OpenAI SDK?** I’m testin...

Kris•10/18/25, 5:02 PM

Saw @ozan's post first.

Trying to figure out the same thing.

When I test the AI Gateway with stream: true, the response is not delivered in a real-time streaming

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