Cause (Documented platform behavior): Without a model the SDK falls back to the legacy tokenizer, which differs for newer models.
Fix status: documented_behavior
Other error fragments:
- The package `tokenizers` is not found. Please run `pip install tokenizers` to install the dependency.
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/voyage-ai/voyageai-python/9aca465efd0011c478031f6d584b70a3a4393a7c/voyageai/_base.py (official_docs, unknown, documented_behavior): Emits this warning when model is omitted and raises ImportError when tokenizers is missing.
Search phrasings: voyage count_tokens specify model warning; voyageai tokenizers not found
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Token counts used for batching disagree with the API's usage and requests exceed token limits.
- Context
- Product: Voyage AI Python SDK (voyageai) Component: voyageai tokenize / count_tokens Operation: vo.count_tokens(texts) without model= Affected versions: observed in voyageai 0.5.0 source; introduction version unknown Environment: unknown Exception: UserWarning, ImportError Packages: voyageai source at 0.5.0 (main 9aca465) Trigger: Calling count_tokens/tokenize without model, or without the tokenizers package.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- Please specify the `model` when using the tokenizer. Voyage's older models use the same tokenizer, but new models may use different tokenizers. If `model` is not specified, the old tokenizer will be used and the results might be different.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [Voyage AI tokenizer] count_tokens without model warns 'Please specify the `model` when using the tokenizer' — old tokenizer gives wrong counts for new models
Recommended action: Always pass model= to count_tokens/tokenize and install tokenizers.
Option: Pass model [evidence: documented_workaround]
Steps:
1. vo.count_tokens(texts, model='voyage-3.5')
Expected: Counts match model tokenizer
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- caf8eac8-682e-42a3-8e03-99c4d467ad63
- Proposed action
- Recommended action: Always pass model= to count_tokens/tokenize and install tokenizers. Option: Pass model [evidence: documented_workaround] Steps: 1. vo.count_tokens(texts, model='voyage-3.5') Expected: Counts match model tokenizer
- 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.