"No Available Channel" Error — What It Means and How to Fix It

If your API request just failed with "no available channel" (sometimes phrased as no available channels for model X under the current group), you hit the single most common error in gateways built on the one-api / new-api architecture — including byesu. It is almost never an outage, and it is usually fixed in under a minute.

Quick answer

The error means the group your token belongs to has no upstream channel serving the model you requested — a routing mismatch, not downtime. Nine times out of ten the fix is to create the token in the right group or to correct the model name spelling. On byesu: open the console, check the exact name in the live model list, and create your token in a group that includes that model.

Symptoms and What the Error Actually Means

You will typically see one of these, often with an HTTP 503 status:

{
  "error": {
    "message": "no available channel for model gpt-5.6 under current group",
    "type": "new_api_error"
  }
}

Three concepts from the gateway's routing model decode it:

• Channel — an upstream connection to a provider (Anthropic, OpenAI, xAI, Google…), declaring which models it serves.
• Group — a set of channels, separating model families, priorities, or billing tiers.
• Token — your sk- key, created inside one group.

On each request the gateway filters channels in two steps: keep channels in the token's group → keep channels that list the requested model. If the result is empty, it returns "no available channel".

Common Causes

Ordered by how often each turns out to be the culprit:

1. Token created in the wrong group. The model exists on the platform, just not in the group your token was born in.
2. Model name typo. grok4.5 instead of grok-4.5, a stray space, or wrong capitalization. Matching is exact — case and hyphens included.
3. The model was renamed or retired. Older tutorials and client presets often carry stale model IDs.
4. Your client silently overrides the model. A config default or environment variable (e.g. ANTHROPIC_MODEL) can win over what you think you selected.
5. (Self-hosted only) The channel itself is misconfigured — disabled, missing the model in its model list, or bound to a different group than the token.

Fix 1: List the Models Your Token Can Actually See

Do not guess — ask the gateway. The OpenAI-compatible GET /v1/models endpoint returns exactly what this token can route to:

curl https://byesu.com/v1/models \
  -H "Authorization: Bearer sk-YOUR_TOKEN"

Search the response for the model you are calling. Two outcomes:

• The model is listed → your group is fine; the request string is wrong somewhere. Go to Fix 3.
• The model is missing → the token's group does not cover it. Go to Fix 2.

Fix 2: Create the Token in the Right Group

Groups are fixed at token creation time, so the clean fix is a new token:

1. Open Console → Tokens.
2. Click Create Token and pick a group that includes the model you want (the group picker shows what each group covers).
3. Copy the new sk- key into your client, replacing the old one entirely.
4. Re-run the request from Fix 1 to confirm the model now appears.

If you call models from several families, either pick a group that covers all of them or keep one token per group.

Fix 3: Check the Model Name — Including Hidden Overrides

Copy the model ID from the console model list, not from memory or an old blog post, and paste it into your client character for character. Then check for silent overrides:

# A client-side default can override your per-request choice.
# Check what your shell exports before blaming the gateway:
env | grep -i model
# e.g. ANTHROPIC_MODEL=claude-opus-4.8 will win in Claude Code

Desktop clients (Cherry Studio, LobeChat, etc.) also keep a per-assistant default model — verify the effective model in the request log, not the dropdown you last touched.

Fix 4 (Self-Hosted Gateways): Audit the Channel Itself

Running your own new-api / one-api instance? When users report this error, check in the admin panel:

1. Channel status — is the channel enabled? Auto-disable after repeated upstream failures is a common silent killer.
2. Channel model list — is the exact model ID present in the channel's models field?
3. Group binding — does the channel's group field match the group of the affected tokens?
4. Test button — run the built-in channel test with the exact model ID to confirm end-to-end routing.

Verify the Fix

One minimal request settles it:

curl https://byesu.com/v1/chat/completions \
  -H "Authorization: Bearer sk-YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-4.5",
    "messages": [
      {"role": "user", "content": "Reply with the single word: ok"}
    ]
  }'

A normal completion means routing is fixed; anything else is a different error — see Common Errors & Fixes.

If You Hit This on byesu

byesu is an AI API gateway with OpenAI-compatible and Anthropic-native endpoints: one key covers Claude, GPT-5.6, Grok and Gemini, billed pay-as-you-go with no subscription. The same group/channel routing described above applies, with a few things that make this error quick to resolve:

• The console shows the live model list with exact IDs — copy from there and typos disappear.
• The token creation dialog shows which models each group covers; see Choosing a Group.
• Billing uses transparent multipliers (input 1x / output 5x / cache hit 0.1x), with your live billed price shown in the console.
• Top up with USDT, Alipay or WeChat Pay.

If the model name is exact, the group covers it, and you still see the error, send support a screenshot of the original error plus the token's group name, and we will check the channel status directly.

FAQ

What does the "no available channel" error mean?

It means the gateway found no upstream channel that can serve the requested model within the group your token belongs to. It is a routing mismatch between the token group and the model, not a service outage. Create the token in the right group and check the model name spelling to fix it.

How do I fix "no available channel" in new-api or one-api?

First call GET /v1/models with your token and compare the exact model spelling against the list. If the model is missing, create a new token in a group that includes it. Self-hosted admins should also confirm the channel is enabled, lists the model, and is bound to the same group as the token.

Why do I get "no available channel" only for some models?

Channels are filtered per group and per model. The group behind your token may include channels for some models but not others, so those requests succeed while the rest fail. Create the token in a group that covers every model you plan to call, or keep separate tokens per group.

Does "no available channel" mean the service is down?

No. The gateway is up and answered your request — it simply could not match any channel to your group and model combination. Real outages usually show up as timeouts or connection errors instead. Fix the group or the model name and the request will route normally.

How do I fix "no available channel" on byesu?

Open the byesu console, check the live model list for the exact model name, then create your token in a group that includes that model. Once the group is right, one key covers Claude, GPT-5.6, Grok and Gemini through both OpenAI-compatible and Anthropic-native endpoints. If the name and group are both correct and the error persists, contact support.