modelparams

Typed model parameters for Python, generated from the open modelparams.dev catalog.

pip install modelparams

Typed request parameters

Generated TypedDict definitions provide autocomplete and static errors for unsupported keys, incorrect value types, and invalid enum values:

from modelparams import validate_params
from modelparams.types.openai import Gpt_4_1Params

params: Gpt_4_1Params = {
    "max_tokens": 1024,
    "temperature": 0.7,
}

validated = validate_params("openai/gpt-4.1", params)

validate_params uses a cached strict Pydantic adapter. It returns a provider-keyed dictionary or raises pydantic.ValidationError for unknown parameters, coercions, invalid enum values, or values outside the catalog range.

from openai import OpenAI

OpenAI().chat.completions.create(model="gpt-4.1", messages=messages, **validated)

Provider-specific dot paths remain literal dictionary keys:

from modelparams.types.anthropic import Claude_Haiku_4_5_20251001Params

params: Claude_Haiku_4_5_20251001Params = {
    "thinking.type": "enabled",
    "thinking.budget_tokens": 4096,
}

Catalog helpers

from modelparams import get_defaults, get_model, get_param, list_models

model = get_model("anthropic/claude-haiku-4-5-20251001")
print(model.auth_type, model.params)

defaults = get_defaults("anthropic/claude-haiku-4-5-20251001")
thinking = get_param("anthropic/claude-haiku-4-5-20251001", "thinking.type")
anthropic_models = list_models("anthropic")

The catalog is bundled with the package. No network request is made at runtime.

Development

From the repository root:

npm run codegen:python
uv sync --project packages/modelparams-python --extra dev
uv run --project packages/modelparams-python pytest packages/modelparams-python/tests

Generated catalog and type files are committed and verified in CI. Python releases use independent modelparams-py@x.y.z tags and publish to PyPI through the repository's trusted-publisher workflow.

Catalog entries expose api_surface as a typed value, so callers can distinguish request families such as openai-chat-completions and openai-responses before using a parameter set.

Metadata

Release files for modelparams 0.0.42

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for modelparams 0.0.42
File	Size	Uploaded
modelparams-0.0.42.tar.gz	46.4 kB	Sep 26, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for modelparams 0.0.42
File	Interpreter	ABI	Platform	Reset
modelparams-0.0.42-py3-none-any.whl 64.1 kB Sep 26, 2026	Python 3	none	any	Details

Total release size: 110.5 kB

Release files / modelparams-0.0.42.tar.gz

Download URL	modelparams-0.0.42.tar.gz
Size	46.4 kB
Tags	Source
SHA-256 checksum How to use checksums	`271107b0ee49f4111e668461c0d214737db0f903f71f039fc3226907c00359fb`
BLAKE2b-256 checksum How to use checksums	`accaf76a490865ae067b8ad467a15205b9b06b1c912fa01502425b37530c656f`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

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Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/mnfst/modelparams.dev
Publishing commit: github.com/mnfst/modelparams.dev/tree/3ef458f8574410a4640b8b05c8b0ad80a6f51f0b

Workflow

Publishing configuration: github.com/mnfst/modelparams.dev/blob/3ef458f8574410a4640b8b05c8b0ad80a6f51f0b/.github/workflows/release-modelparams-python.yml
Publishing logs: github.com/mnfst/modelparams.dev/actions/runs/36272877465/attempts/1

Artifact

Subject: modelparams-0.0.42.tar.gz
SHA-256 checksum: 271107b0ee49f4111e668461c0d214737db0f903f71f039fc3226907c00359fb Verifying attestations

Release files / modelparams-0.0.42-py3-none-any.whl

Download URL	modelparams-0.0.42-py3-none-any.whl
Size	64.1 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`83a731a5fca8c939b56b40e5530a3d4e374c1faff41e537245ec996536504a07`
BLAKE2b-256 checksum How to use checksums	`ba0b26762ab4e1bba26422af07de397eb1e962d03b15f7a7ae6e71472dd9fbec`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/mnfst/modelparams.dev
Publishing commit: github.com/mnfst/modelparams.dev/tree/3ef458f8574410a4640b8b05c8b0ad80a6f51f0b

Workflow

Publishing configuration: github.com/mnfst/modelparams.dev/blob/3ef458f8574410a4640b8b05c8b0ad80a6f51f0b/.github/workflows/release-modelparams-python.yml
Publishing logs: github.com/mnfst/modelparams.dev/actions/runs/36272877465/attempts/1

Artifact

Subject: modelparams-0.0.42-py3-none-any.whl
SHA-256 checksum: 83a731a5fca8c939b56b40e5530a3d4e374c1faff41e537245ec996536504a07 Verifying attestations