Paragraphs
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Model cascade

Send the right unit to the right model.

Translation is not one job. A product attribute is not a legal paragraph. The cascade routes each unit to the model best fit for it, scores the output, and persists.

The pipeline

Six steps. Every unit.

  1. Step 1

    TM lookup

    Match against your project's translation memory. ≥0.95 → reuse for free. 0.85–0.95 → use as a hint.

  2. Step 2

    Glossary preprocessing

    Brand terms wrapped as model placeholders so they're guaranteed to round-trip unchanged.

  3. Step 3

    Tiered routing

    Tier A (DeepL) for short, high-confidence. Tier B (Sonnet) for content. Tier C (Opus) for long-form and structured.

  4. Step 4

    Quality scoring

    Claude Haiku rates the output 0.00–1.00. Threshold per project gates auto-approval.

  5. Step 5

    Glossary postprocessing

    Placeholders restored to the locale-correct rendering. Brand voice preserved exactly.

  6. Step 6

    Persist

    translations row inserted. Embedding indexed for future TM. Webhook fires if status changes.

The tiers

When each model wins.

Tier Default model Best for COGS / 1M words
A DeepL Pro Buttons, attribute values, menu items, alt text — short and high-confidence ~£11
B Claude Sonnet Post titles, paragraphs, product descriptions, FAQ answers ~£28
C Claude Opus Legal pages, terms, JSON-LD structures, complex marketing copy ~£72
Cost economics

A worked example.

A site translating 1 million words / month, typical mix (60% Tier A, 30% Tier B, 10% Tier C):

  • · Weighted COGS: ~£21.50 / month
  • · After 60% TM hit rate: ~£8.60 / month
  • · Your bill on Growth (£65/mo annual): covers up to 2M words

Numbers are guidance, not guarantees — content mix varies. The point is that the cascade is built around economics, not "send everything to GPT and hope."

Override per unit type

Quality always wins where it matters.

The cascade is configurable per project. Route every post_title to Tier C if title quality matters more than spend; route every attribute_value to Tier A even if the engine would have escalated. One YAML.

.paragraphs/routing.yaml yaml 
tiers:
  post_title:        C   # title quality matters more than cost
  product_name:      C
  paragraph:         B
  attribute_value:   A
  alt_text:          A
  json_ld:           C   # schema must be exact

quality:
  auto_approve_threshold: 0.85
  flag_for_review_below:  0.70

translation_memory:
  reuse_above: 0.95
  hint_above:  0.85

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No credit card. 100,000 words on the free tier. Self-serve onboarding.

See pricing Read the engine docs