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Public story · 2026-08-16 · high
A provider-prefixed model name broke llmix's capability matching, dropping the reasoning-effort setting with no error.
Why now: This is covered in the August 16, 2026 briefing, drawn from llmix's GitHub release notes.
llmix silently dropped the reasoningEffort parameter for provider-prefixed model names, per the project's GitHub release notes for version 2.2.0. The failure showed up on a model addressed as openai/gpt-5.6-luna, whose prefix broke the router's anchored capability matching. Pricing lookup for that model came back empty too. Neither failure threw an error.
Anyone who sets an effort level in code assumes it reaches the model. Here it didn't, and nothing in the response flagged the drop. OpenRouter and LiteLLM route models the same prefixed way, so the same gap can show up there too. Checking that the effort level actually reaches the provider takes a few minutes.
Version 2.2.0 is where the fix lands, tagged on GitHub. Anyone still on an earlier build hasn't gotten it, and any provider-prefixed model string is worth a second look.
If effort levels have ever quietly not worked, don't assume the model ignored the setting. Check the actual request your gateway sent before it left.
Each link below shares sources, entities, or timing with this story.
TeamPCP criticizes LiteLLM / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (TeamPCP criticizes LiteLLM); both cover GitHub, LiteLLM; reported by the same outlet (github.com).
LiteLLM supports Anthropic / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (LiteLLM supports Anthropic); both cover Check, GitHub; overlapping topics (check, effort, gpt 5).
LiteLLM supports OpenAI / Shared entities / Same source domain / Earlier coverage
Linked by a graph relationship (LiteLLM supports OpenAI); both cover GitHub, OpenRouter; reported by the same outlet (github.com).
Shared entities / Same source / Shared topic
Both cover GitHub, LiteLLM, OpenRouter; cite the same source (GitHub); overlapping topics (addressed, anchored, capability, check, deleted).
TeamPCP criticizes LiteLLM / Shared entities / Earlier coverage
Linked by a graph relationship (TeamPCP criticizes LiteLLM); both cover GitHub, LiteLLM; earlier GitHub coverage from 2026-03-27.
Claude criticizes LiteLLM / Shared entities / Earlier coverage
Linked by a graph relationship (Claude criticizes LiteLLM); both cover Check, LiteLLM; earlier Check coverage from 2026-03-25.
LiteLLM supports Anthropic / Shared entity: GitHub / Same source domain / Earlier coverage / Tension
Linked by a graph relationship (LiteLLM supports Anthropic); both cover GitHub; reported by the same outlet (github.com).
LiteLLM supports Anthropic / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (LiteLLM supports Anthropic); both cover GitHub, LiteLLM; reported by the same outlet (github.com).