Fix model_id: claude-opus-4.8 → claude-opus-4-8

[ajwcontreras]

The catalog model_id anthropic/claude-opus-4.8 works on Workers AI's /ai/v1/messages (CF normalizes . → - internally) but fails through AI Gateway provider routing, which forwards the id literally to Anthropic:

{
  "request_id": "req_011CbYUJederp2KvDoT8QYJU",
  "error": {
    "type": "not_found_error",
    "message": "model: claude-opus-4.8 was not found. Did you mean claude-opus-4-8?"
  },
  "type": "error"
}

Hyphen form works on both paths; dot only works on one. See comment for screenshot + curl evidence.

[ajwcontreras]

Evidence — same id, two paths, different behavior.

AI Gateway provider-native (fails — Anthropic 404, screenshot from gateway logs):

Workers AI /ai/v1/messages (works — CF normalizes . → - server-side):

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/messages \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "anthropic/claude-opus-4.8",
    "max_tokens": 64,
    "messages": [{"content": "reply with the single word: OK", "role": "user"}]
  }'
# → {"model":"claude-opus-4-8","stop_reason":"end_turn","content":[{"type":"text","text":"OK"}], ...}

Note the upstream-normalized "model":"claude-opus-4-8" in the response — the hyphen form is what Anthropic actually serves. Switching the catalog id to anthropic/claude-opus-4-8 works on both paths and matches what Anthropic returns.

[cloudflare-docs-bot]

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[ajwcontreras]

Closing — broader smoke shows the catalog is correct.

On Workers AI's OpenAI-compat endpoint (/ai/v1/chat/completions), the model id is matched literally and only the dot form works:

anthropic/claude-opus-4.8   →  200
anthropic/claude-opus-4-8   →  404 Model not found

So three endpoints, three behaviors for the same upstream:

endpoint	dot (4.8)	hyphen (4-8)
/ai/v1/chat/completions (OpenAI-compat)	200	404
/ai/v1/messages (Anthropic-compat, CF normalizes)	200	200
AI Gateway provider-native (literal forward)	404 (Anthropic)	200

The catalog id is the OpenAI-compat key, where dot is required. Switching to hyphen would break that endpoint. The AI Gateway 404 I hit is an AIG-side concern (literal forwarding to Anthropic), not a catalog issue. Apologies for the noise — I should have smoked all three endpoints before opening.