morph-v3-fast
Morph V3 Fast is Morph’s fastest apply model for code edits. Prompts follow a fixed format with <instruction>, <code> and <update> sections.
Precio: Entrada: 192 créditos / 1 M de tokens (≈ $0.96); salida: 288 créditos / 1 M de tokens (≈ $1.44).
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Morph V3 Fast API on ModelFold
Morph V3 Fast is Morph’s fastest apply model for code edits. Prompts follow a fixed format with <instruction>, <code> and <update> sections. Try Morph V3 Fast in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Morph V3 Fast API
Morph V3 Fast at a glance
Morph V3 Fast is a chat model from Morph. It accepts text as input and returns text, with a context window of up to 262K tokens.
Use it without hosting anything
On ModelFold you call Morph V3 Fast with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Morph V3 Fast
Up to 262K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Morph V3 Fast on ModelFold
- 1
Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Morph V3 Fast responds before writing any code.
- 2
Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
- 3
Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "morph-v3-fast" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Morph V3 Fast
AI coding assistants
Generate, explain, debug and refactor code, review pull requests and work through multi-file changes in developer tools and IDE plugins.
Low-latency experiences
Power chat interfaces, autocomplete and interactive tools where users expect fast responses.
High-volume pipelines
Run classification, extraction, rewriting and batch jobs at scale where cost per request matters.
Frequently Asked Questions
What is Morph V3 Fast?⌄
Morph V3 Fast is Morph’s fastest apply model for code edits. Prompts follow a fixed format with <instruction>, <code> and <update> sections.
Which inputs does Morph V3 Fast support?⌄
Morph V3 Fast accepts text and returns text. Through ModelFold you send text messages; documents attached in the Playground are converted to text.
How long is the context window of Morph V3 Fast?⌄
Up to 262K tokens, shared between your input and the model’s output.
Does Morph V3 Fast support function calling?⌄
Function calling is not listed for Morph V3 Fast; requests that include tools will be rejected. Use plain prompts or JSON output instead.
How is Morph V3 Fast billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Morph V3 Fast through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "morph-v3-fast", using your ModelFold API key as the Bearer token.
| Entrada | 192 créditos 1M tokens≈ $0.96 |
| Salida | 288 créditos 1M tokens≈ $1.44 |
Se cobra por token, con tarifas separadas para entrada y salida. Los tokens de razonamiento cuentan como salida. El entorno de pruebas aplica exactamente el mismo cálculo.
Leer la documentación de la API →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"morph-v3-fast","messages":[{"role":"user","content":"Hello"}]}'