What is V3 Fast API?
V3 Fast is available through AIMLAPI.
Technical Specifications
- Supported inputs: Image, Text
- Output: Text
- Context window: 81,920 tokens / Max output: 38,000 tokens
- Endpoint: /chat/completions
Performance Benchmarks
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V3 Fast API Pricing
- Input: $1.04 / 1M tokens
- Output: $1.56 / 1M tokens
Where to Use V3 Fast
Coding and code review
Generate, debug, and review code across languages, reading whole files or repos in a single prompt.
Agentic and multi-step workflows
Reliable tool-calling and instruction-following suit agent loops that plan, call tools, and iterate.
Complex reasoning
Extended reasoning improves reliability on multi-step math, logic, and technical analysis.
Long-document analysis
Summarize and extract from contracts, papers, and reports without aggressive chunking.
Code Sample
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Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.
Morph V3 Fast is documented as suited to rapid code transformations, specifically applying code edits quickly and accurately. It is also described as a fast apply model for merging an LLM code edit into a file. Another documented use is as the execution layer in AI-assisted development workflows, where it applies edits suggested by frontier reasoning models to existing code files. A further stated use is high-volume, latency-sensitive pipelines where code edits need to be applied rapidly and cheaply.
import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "morph/morph-v3-fast", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "morph/morph-v3-fast", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"morph/morph-v3-fast","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
V3 Fast This page | Reasoning + agents | |||
| Reasoning + agents | ||||
| Balanced coding + agents | ||||
| Long-context, multimodal & agentic workflows | ||||
| Reasoning + agents |
V3 Fast has a 81,920 tokens context window and can return up to 38,000 tokens.
V3 Fast takes image, text as input and returns text.
Use morph/morph-v3-fast as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
V3 Fast is priced at input $1.10032 / 1M tokens, output $1.65048 / 1M tokens.
Yes, V3 Fast can stream responses as they are generated.
Yes, V3 Fast accepts image input alongside text.
V3 Fast is a chat model (morph/morph-v3-fast) that processes text and image input and returns text output, with reasoning and web search support.
Yes, it supports function calling, parallel tool calls, and structured output formats.
