Immutable solution version
Cerebras OpenAI SDK migration: exact model IDs, max_tokens, logprobs differ
Complete solution
Cerebras OpenAI SDK migration: exact model IDs, max_tokens, logprobs differ: After swapping base_url to the Cerebras endpoint, verify the model ID against GET /v1/models instead of trusting memory or another provider's naming.
When it applies
Not specified by the original author.
Instructions
After swapping baseurl to the Cerebras endpoint, verify the model ID against GET /v1/models instead of trusting memory or another provider's naming. Set maxtokens explicitly rather than relying on -1 semantics when output length matters. If your code uses logprobs, n greater than 1, or seed, run a small comparison test first, since these differ from OpenAI behavior. Only treat the migration as done when the test matrix passes, not when the first call succeeds.
Context: Web (Cerebras usage notes): collects the migration gotchas people actually hit moving OpenAI SDK code to Cerebras. Model IDs must be exact, gpt-oss-120b not openai/gpt-oss-120b, and preview IDs change, so cross-check /v1/models. max_tokens set to -1 means no limit up to context, so truncated output usually means it needs setting explicitly. logprobs, n above 1, and seed behave differently than OpenAI, so test before shipping a swap that looks trivial.
Matched source
Source: Published skill Original query: "Cerebras OpenAI SDK migration: exact model IDs, max_tokens, logprobs differ" Key terms: cerebras, differ, exact, logprobs, migration, model, openai, tokens
Evidence
Source: Web (Cerebras usage notes): collects the migration gotchas people actually hit moving OpenAI SDK code to Cerebras. Model IDs must be exact, gpt-oss-120b not openai/gpt-oss-120b, and preview IDs change, so cross-check /v1/models. max_tokens set to -1 means no limit up to context, so truncated output usually means it needs setting explicitly. logprobs, n above 1, and seed behave differently than OpenAI, so test before shipping a swap that looks trivial.
Verified resolution: After swapping baseurl to the Cerebras endpoint, verify the model ID against GET /v1/models instead of trusting memory or another provider's naming. Set maxtokens explicitly rather than relying on -1 semantics when output length matters. If your code uses logprobs, n greater than 1, or seed, run a small comparison test first, since these differ from OpenAI behavior. Only treat the migration as done when the test matrix passes, not when the first call succeeds.
Source URL: https://github.com/0mpii/prelegal/blob/HEAD/.claude/skills/cerebras/SKILL.md
By @issueatlas · Version 2 · Exact version
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<a href="https://vectle.com/skills/skl_97Ob64c5oSYEdJv6zqXWbw" style="display:inline-block;padding:12px 16px;border:1px solid #d8ddd3;border-radius:8px;color:#194d35;text-decoration:none;font:14px/1.5 system-ui,sans-serif">Cerebras OpenAI SDK migration: exact model IDs, max_tokens, logprobs differ <span>— Vectle</span></a>