# MiniMax M3.1 Flash

> MiniMax M3.1 Flash is the generally available Flash model in MiniMax's M3.1 line, released on October 19, 2026 to replace the September preview. MiniMax positions it on speed and cost for everyday development and agent work — bug fixes, feature builds, agentic coding.

Canonical: https://routemux.com/minimax/minimax-m3.1-flash
Provider: MiniMax

## Key facts

| Field | Value |
| --- | --- |
| Model ID | minimax/minimax-m3.1-flash |
| Official model ID | MiniMax-M3.1-Flash |
| Context window | 1M |
| Input modalities | text, image |
| Output modalities | text |
| Capabilities | Vision, Reasoning, Tool Calling, Coding, Cache |
| Upstream release | 2026-10-19 |
| Availability | available |

## Pricing

- RouteMux input: $0.045 per 1M tokens
- RouteMux output: $0.18 per 1M tokens
- Official input: $0.15 per 1M tokens
- Official output: $0.6 per 1M tokens
- Cache read: $0.0045 per 1M tokens
- Saving vs official: 70%
- Official price source: minimax_text_x0.30, verified 2026-10-20

Billing is prepaid wallet, charged per successful request only.

## API access

Base URL: https://api.routemux.com

Supported protocols:

- openai_chat
- openai_responses
- anthropic_messages

Aliases that also route here: minimax-m2.7, minimax-m2.7-highspeed, minimax-m3.1-flash-preview, minimax/minimax-m2.7, minimax/minimax-m2.7-highspeed, minimax/minimax-m3.1-flash-preview

## What is MiniMax M3.1 Flash

MiniMax M3.1 Flash is the generally available Flash model in MiniMax's M3.1 line, released on October 19, 2026 to replace the September preview. MiniMax positions it on speed and cost for everyday development and agent work — bug fixes, feature builds, agentic coding.

It has a 1M-token context window, text and image input, tool calling and prompt caching, and answers on OpenAI Chat Completions, OpenAI Responses and Anthropic Messages. Thinking is always on and cannot be switched off; the depth is set with a reasoning effort of low, medium, high, xhigh or max. When you omit it, MiniMax defaults to max.

Through RouteMux it is $0.045 per 1M input tokens against MiniMax's $0.15, $0.18 against $0.60 on output, and $0.0045 against $0.015 for cached input, with no context-length tiers.

Requests to the old model names minimax-m3.1-flash-preview, minimax-m2.7 and minimax-m2.7-highspeed are now served by this model and billed at its price — no code changes needed.

## Key capabilities

- **Five effort levels** — low / medium / high / xhigh / max. The default is max — set a lower level explicitly for latency-sensitive work.
- **1M-token context** — Text and image input, with no context-length price tiers.
- **Tool calling and caching** — Native tool calling and automatic prompt caching.
- **Three protocols** — OpenAI Chat, OpenAI Responses and Anthropic Messages.

## Sources

- [MiniMax — M3.1 Flash announcement](https://www.minimax.io/blog/minimax-m31f)
- [MiniMax — Pay-as-you-go pricing](https://platform.minimax.io/docs/guides/pricing-paygo)
- [MiniMax — Text generation guide](https://platform.minimax.io/docs/guides/text-generation)

_Content reviewed by Jerry Fan on 2026-10-20._