V3 Fast API

V3 Fast on AIMLAPI.

Modalities
Image, TextText
In / Out price
$0.8464/$1.27per 1M
Context window
80K tokens
Released
Jul 7, 2025

V3 Fast overview

V3 Fast specs

Model ID
morph/morph-v3-fast
Developer
Morph
Context window
81,920 tokens
Max output
38,000 tokens
Input
Image, Text
Output
Text
API
OpenAI-compatible, base URL https://api.aimlapi.com/v1

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.

Use cases

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.

Capabilities

  • Function calling
  • Reasoning
  • Streaming
  • Structured outputs
  • Web search

V3 Fast API pricing

V3 Fast pricing in US dollars
UsagePriceUnit
Input$0.84641M tokens
Output$1.271M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

V3 Fast vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
ModelInputOutput
V3 Fast$0.8464$1.27
GPT-5.6 Luna Pro$0.2116$1.27
Qwen3-Next-80B-A3B Instruct$0.1587$1.27
Qwen3.7 Plus$0.32$1.28
V3 Large$0.9522$2.01

How to use the V3 Fast API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl '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": "Write a haiku about the ocean."
    }
  ]
}'

Related articles

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V3 Fast FAQ

What is the context window of V3 Fast?

V3 Fast has a 81,920 tokens context window and can return up to 38,000 tokens.

What inputs and outputs does V3 Fast support?

V3 Fast takes image, text as input and returns text.

What is the model ID for V3 Fast?

Use morph/morph-v3-fast as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

How much does V3 Fast cost?

V3 Fast costs $0.8464 input and $1.27 output per 1M tokens on AI/ML API, billed as you go with no subscription.

Does V3 Fast support streaming?

Yes, V3 Fast can stream responses as they are generated.

Can V3 Fast read images?

Yes, V3 Fast accepts image input alongside text.

What is Morph V3 Fast?

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.

Does V3 Fast support function calling and tool use?

Yes, it supports function calling, parallel tool calls, and structured output formats.

Start building with V3 Fast

V3 Fast API

morph/morph-v3-fast

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl '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": "Write a haiku about the ocean."
    }
  ]
}'