AGPL-3.0-or-later · forever.

the provider catalog

Anthropic Claude

Claude models with explicit thinking budgets: the reasoning is a declared line item in the file, priced by the audit like everything else. One provider/model line moves a workflow here or away again: the same file runs on every provider the catalog names, and swapping is a one-word diff. Machines read the catalog; the binary answers nika catalog.

  • 2pinned modelsaliases pin exact upstream ids
  • cloudfamilybring your own key; it rides an env var and stays yours
  • ANTHROPIC_API_KEYthe key rides herean env var, never a config file
  • anthropicwire dialectthe adapter speaks it

the wire

cloud · bring your own key; it rides an env var and stays yours

A workflow names this provider in the model line (model: anthropic/claude-sonnet-4-20250514), and the engine speaks anthropic on the wire. The key rides ANTHROPIC_API_KEY in the environment, never a config file, never the workflow. The provider id also answers to claude.

default
claude-sonnet-4-20250514
cheap
claude-haiku-4-5-20251001
dialect
anthropic
tags
extended-thinking · frontier · function-calling · long-context · prompt-caching · streaming · structured-output · vision

the models

2 pins

Aliases are what the file may write; the engine pins each one to an exact upstream id, so a run stays reproducible after a vendor rotates names.

  • sonnetclaude-sonnet-4-20250514ctx 200k · reasoning · vision · json:schema$3/M in · $15/M out
  • haikuclaude-haiku-4-5-20251001ctx 200k · reasoning · vision · json:schema

prices are the ENGINE's, not ours: the audit's pricing snapshot (models.dev · pinned 2026-07-07): the same table nika check prices your ceiling with.

in the released catalog

2 rooms

The wire models this provider serves in the released binary's catalog · each one is a room with its seats, exact prices and measured energy.

the whole register: /catalog/models · what the released binary knows, vendored at the engine pin.

in a real file

a complete workflow · shown whole
anthropic.nika.yaml
nika: v1workflow:  id: reasoned-review  description: "a careful pass with a visible thinking budget — the key rides ANTHROPIC_API_KEY"tasks:  review:    infer:      model: anthropic/claude-sonnet-4-20250514      max_tokens: 400      thinking: { enabled: true, budget_tokens: 2000 }      prompt: |        Name the single riskiest assumption in this plan:        ship on Friday, no rollback path, one reviewer.outputs:  verdict: ${{ tasks.review.output }}

check-green against the released engine · 1 task · 1 wave · worst-case ceiling $0.0060 · the drift gate re-proves this copy on every test run · open it in the playground →

get set up

keys at platform.claude.com
  1. 1Create a key in the Claude console.
  2. 2The key rides the environment, never the file export ANTHROPIC_API_KEY=…

Pick it for careful reading, long documents, reviews where the reasoning should be visible. Then prove the seat: nika doctor names every provider this binary can reach.

swap it

10 more cloud seats

Moving off Anthropic Claude is editing one line. The rest of the file (tasks, permits, outputs, the trace) does not change. The register orders the catalog local first; beyond it the engine embeds 21 more OpenAI-compatible endpoints.

cross-references

the words that meet it

Try it in the playground, or install and go local first. Read the spec →