Summary
Claude Opus 5.5 is listed on the Vertex AI Claude partner models page (navigation sidebar shows "Claude Opus 5.5" under Model details), but the Vertex-specific catalog entry publishers/anthropic/models/claude-opus-5-5 is missing from model_list.json.
Every other recent Claude model has a Vertex entry following this pattern — e.g., publishers/anthropic/models/claude-opus-5 (line 7333), publishers/anthropic/models/claude-opus-4-8 (line 7350).
Missing Model
| Model ID |
Provider |
Notes |
publishers/anthropic/models/claude-opus-5-5 |
vertex |
Follows established Vertex naming convention |
Suggested Catalog Entry
Using publishers/anthropic/models/claude-opus-5 (line 7333) as the template:
"publishers/anthropic/models/claude-opus-5-5": {
"format": "anthropic",
"flavor": "chat",
"multimodal": true,
"input_cost_per_mil_tokens": 4,
"output_cost_per_mil_tokens": 20,
"input_cache_read_cost_per_mil_tokens": 0.2,
"input_cache_write_cost_per_mil_tokens": 5,
"displayName": "Claude Opus 5.5",
"reasoning": true,
"reasoning_budget": true,
"max_input_tokens": 1000000,
"max_output_tokens": 128000,
"available_providers": ["vertex"]
}
Pricing matches Anthropic's direct pricing for the base claude-opus-5-5 entry (line 8734). Vertex Claude pricing typically matches Anthropic direct pricing (see existing publishers/anthropic/models/claude-opus-5 at $5/$25 matching claude-opus-5 at $5/$25).
Verification Checklist
| Check |
Status |
Detail |
| Cross-source |
✅ |
Listed on Vertex AI Claude partner models (sidebar navigation under Model details). Model existence independently confirmed via Bedrock model card and base claude-opus-5-5 entry (line 8734) |
| Already in catalog |
✅ |
grep for publishers/anthropic/models/claude-opus-5-5 returns zero matches |
| ID format |
✅ |
Follows existing convention: publishers/anthropic/models/claude-opus-5 (line 7333), publishers/anthropic/models/claude-opus-4-8 (line 7350) |
| Not deprecated |
✅ |
Launched September 22, 2026 |
| Duplicate check |
✅ |
No open or closed issue covers this Vertex entry |
Related Issues
Local Files Inspected
packages/proxy/schema/model_list.json — confirmed publishers/anthropic/models/claude-opus-5-5 absent; template publishers/anthropic/models/claude-opus-5 at line 7333; base model claude-opus-5-5 at line 8734
Summary
Claude Opus 5.5 is listed on the Vertex AI Claude partner models page (navigation sidebar shows "Claude Opus 5.5" under Model details), but the Vertex-specific catalog entry
publishers/anthropic/models/claude-opus-5-5is missing frommodel_list.json.Every other recent Claude model has a Vertex entry following this pattern — e.g.,
publishers/anthropic/models/claude-opus-5(line 7333),publishers/anthropic/models/claude-opus-4-8(line 7350).Missing Model
publishers/anthropic/models/claude-opus-5-5Suggested Catalog Entry
Using
publishers/anthropic/models/claude-opus-5(line 7333) as the template:Pricing matches Anthropic's direct pricing for the base
claude-opus-5-5entry (line 8734). Vertex Claude pricing typically matches Anthropic direct pricing (see existingpublishers/anthropic/models/claude-opus-5at $5/$25 matchingclaude-opus-5at $5/$25).Verification Checklist
claude-opus-5-5entry (line 8734)publishers/anthropic/models/claude-opus-5-5returns zero matchespublishers/anthropic/models/claude-opus-5(line 7333),publishers/anthropic/models/claude-opus-4-8(line 7350)Related Issues
anthropic.claude-opus-5-5+ global + us variantsLocal Files Inspected
packages/proxy/schema/model_list.json— confirmedpublishers/anthropic/models/claude-opus-5-5absent; templatepublishers/anthropic/models/claude-opus-5at line 7333; base modelclaude-opus-5-5at line 8734