Models API supported models
Model IDs available on the Models API for chat, embeddings, image generation, and text-to-speech—grouped by endpoint with their vendor.
Early preview: This API is in early preview. Fill out this form to request early access.
Overview
Pass these model values to the OpenAI-compatible endpoints (/chat/completions, /embeddings, /images/generations, /audio/speech).
Pricing: Usage is billed in monday AI tokens. There is no extra markup when you use the recommended monday-* chat aliases below. Direct model IDs on chat and all embeddings, image, and audio calls currently include a 10% surcharge on underlying cost. See Pricing and metering on the overview for details and preview rounding rules.
Recommended chat model aliases
For POST /chat/completions, we recommend always passing one of these aliases instead of a raw vendor model ID. Aliases are more stable: monday can change which underlying model powers each tier (fast, standard, powerful) without you renaming models in every app.
| Alias | Resolves to | Notes |
|---|---|---|
monday-fast | claude-haiku-4-5 | Fast, cost efficient tier |
monday-standard | claude-sonnet-4-6 | Default when you omit model from the request |
monday-powerful | claude-opus-4-6 | Highest capability tier |
You can still pass any supported direct Claude or OpenAI ID from the tables below; those requests follow the 10% surcharge rule described on the overview.
Text and chat (/chat/completions)
/chat/completions)| Model ID | Vendor |
|---|---|
gpt-4o | OpenAI |
gpt-4o-mini | OpenAI |
gpt-4.1 | OpenAI |
gpt-4.1-mini | OpenAI |
gpt-4.1-nano | OpenAI |
gpt-5 | OpenAI |
gpt-5-mini | OpenAI |
gpt-5-nano | OpenAI |
claude-opus-4-6 | Anthropic |
claude-opus-4-5 | Anthropic |
claude-sonnet-4-6 | Anthropic |
claude-sonnet-4-5 | Anthropic |
claude-sonnet-4 | Anthropic |
claude-haiku-4-5 | Anthropic |
claude-3-7-sonnet | Anthropic |
claude-3-5-sonnet | Anthropic |
claude-3-haiku | Anthropic |
Embeddings (/embeddings)
/embeddings)| Model ID | Vendor |
|---|---|
text-embedding-3-large | OpenAI |
text-embedding-ada-002 | OpenAI |
Image generation (/images/generations)
/images/generations)Models
| Model ID | Vendor |
|---|---|
dall-e-3 | OpenAI |
dall-e-2 | OpenAI |
gpt-image-1 | OpenAI |
Typical size values
size valuesExact availability depends on the model; common values include:
size values (reference) |
|---|
256x256, 512x512, 1024x1024 |
1024x1792, 1792x1024 (where supported) |
auto (where supported for a given model) |
Validate sizes in your integration against live API behavior during preview—unsupported combinations may return an error with no usage charged.
Text-to-speech (/audio/speech)
/audio/speech)| Model ID | Vendor |
|---|---|
tts-1 | OpenAI |
tts-1-hd | OpenAI |
gpt-4o-mini-tts | OpenAI |
gpt-4o-tts | OpenAI |
Voices and audio formats follow the same parameter names as the OpenAI Speech API (for example voice, response_format, speed).
Defaults
If you omit model on /chat/completions, the Models API uses monday-standard, which resolves to claude-sonnet-4-6. For other endpoints, defaults vary; prefer setting model explicitly in production so upgrades to defaults never change your app behavior unexpectedly.
See also
Updated about 4 hours ago