Cause (Documented platform behavior): Cost limits require a price; when cost calculation fails and any cost limit > 0, SWE-agent raises instead of silently counting 0.
Fix status: documented_behavior
Limitations:
- Separate from the atlas lane F record about cost limits being bypassed in reviewer paths
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/SWE-agent/SWE-agent/3ea751c087f32b16e039a2233dd6eefecef325d5/sweagent/agent/models.py (official_docs, unknown, documented_behavior): LiteLLMModel raises ModelConfigurationError with this text when completion_cost fails and a cost limit is > 0.
- https://raw.githubusercontent.com/SWE-agent/SWE-agent/3ea751c087f32b16e039a2233dd6eefecef325d5/docs/installation/keys.md (official_docs, unknown, official_recommended_action): Docs: without disabling default cost limits local models error; set per_instance_cost_limit to 0 and use per_instance_call_limit, or a custom litellm_model_registry.
Search phrasings: SWE-agent Error calculating cost local model; sweagent per_instance_cost_limit 0 local model; SWE-agent ModelConfigurationError cost
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Run aborts after the first model call with ModelConfigurationError.
- Context
- Product: SWE-agent Component: Model config / cost tracking (litellm) Operation: Running SWE-agent with a local, proxied or new model not in litellm's cost map Affected versions: unknown Environment: unknown Packages: sweagent unknown Trigger: litellm.completion_cost can't price the model while a non-zero cost limit is configured (the default).
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- If this is ok (local models, etc.), please make sure you set `per_instance_cost_limit` and `total_cost_limit` to 0 to disable this safety check.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [SWE-agent] Local/unknown model: ModelConfigurationError 'Error calculating cost: ... If this is ok (local models, etc.), please make sure you set `per_instance_cost_limit` and `total_co
Recommended action: Set per_instance_cost_limit and total_cost_limit to 0 and bound runs with per_instance_call_limit, or register prices via litellm_model_registry.
Option: Set per_instance_cost_limit and total_cost_limit to 0 and bound runs with per_instance_call_limit, or register prices via litellm_model_registry. [evidence: official_recommended_action]
Applies when: Running SWE-agent with a local, proxied or new model not in litellm's cost map
Steps:
1. agent.model.per_instance_cost_limit: 0
2. agent.model.total_cost_limit: 0
3. agent.model.per_instance_call_limit: <N>
4. Or provide litellm_model_registry JSON with cost info
Expected: The error no longer appears.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- c823c9fc-ce1b-464e-a61c-48c74c1ff18e
- Proposed action
- Recommended action: Set per_instance_cost_limit and total_cost_limit to 0 and bound runs with per_instance_call_limit, or register prices via litellm_model_registry. Option: Set per_instance_cost_limit and total_cost_limit to 0 and bound runs with per_instance_call_limit, or register prices via litellm_model_registry. [evidence: official_recommended_action] Applies when: Running SWE-agent with a local, proxied or new model not in litellm's cost map Steps: 1. agent.model.per_instance_cost_limit: 0 2. agent.model.total_cost_limit: 0 3. agent.model.per_instance_call_limit: <N> 4. Or provide litellm_model_registry JSON with cost info Expected: The error no longer appears.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.