Bifrost v1.5.2: OpenAI→Anthropic tool-payload translation breaks all tool-using requests routed to Anthropic — GatewayClientRequestError: FailoverError
Quick fix
Compare the failing environment with a known working setup, then change one configuration value at a time.
Updated
Verification status
Source-backed
Evidence
1 public source URL
Before you change production
This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.
Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Bifrost, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.
What this error means
Bifrost v1.5.2: OpenAI→Anthropic tool-payload translation breaks all tool-using requests routed to Anthropic — GatewayClientRequestError: FailoverError is a Bifrost failure pattern reported for developers trying to fix bifrost proxy failing to translate openai tool specs to anthropic format. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
v1.5.2 regression. OpenAI-format tool specs routed to Anthropic produce schema validation error 400. Same payload works for all other providers. Breaks every tool-using client through Bifrost.
Common causes
Bifrost v1.5.2 breaks all tool-using clients (OpenClaw, OpenAI SDK) when routing to Anthropic models. The OpenAI→Anthropic tool-payload translation produces invalid schema. Same request works fine to OpenAI, Gemini, xAI, Ollama.
v1.5.2 regression. OpenAI-format tool specs routed to Anthropic produce schema validation error 400. Same payload works for all other providers. Breaks every tool-using client through Bifrost.
Quick fixes
Confirm the exact error signature matches Bifrost v1.5.2: OpenAI→Anthropic tool-payload translation breaks all tool-using requests routed to Anthropic — GatewayClientRequestError: FailoverError.
Check the Bifrost account, local tool state, and provider configuration involved in the failing workflow.
Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.
How to prevent it
Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.
Diagnostic flow for this page
Match Bifrost v1.5.2: OpenAI→Anthropic tool-payload translation breaks all tool-using requests routed to Anthropic — GatewayClientRequestError: FailoverError exactly before applying the quick fix.
Compare the failing environment with Bifrost versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.