MiniMax M3.1 Flash API
Coming SoonMiniMax M3.1 Flash is a high-speed multimodal reasoning LLM with a 1M context window, optimized for agentic workflows, coding, tool use, and computer tasks.
MiniMax M3.1 Flash API Background
Overview
The MiniMax M3.1 Flash API provides developer access to an advanced, high-throughput multimodal reasoning model engineered by MiniMax. Built for complex agentic reasoning, computer use, tool calling, and long-context processing, the MiniMax M3.1 Flash API accepts text, image, and video inputs while generating structured text outputs across an extensive 1,000,000-token context window. Featuring an always-on reasoning core with configurable effort levels, the MiniMax M3.1 Flash API is designed for high-performance agent architectures requiring dual compatibility with Anthropic and OpenAI SDK standards.
Development History
MiniMax officially introduced the model on October 19, 2026, identifying it in production endpoints as MiniMax-M3.1-Flash. During earlier evaluations, an anonymous version operated under the moniker Space Bunny. Developed to support modern agentic workflows, the MiniMax M3.1 Flash API launched across official developer interfaces, M Plan, and MiniMax Code, establishing high-speed reasoning endpoints with future standalone weight releases planned by the vendor.
Key Innovations
- Always-on chain-of-thought reasoning built into the MiniMax M3.1 Flash API with five granular effort levels ranging from low to max.
- Native dual API compatibility allowing the MiniMax M3.1 Flash API to drop into existing OpenAI Chat Completions or Anthropic client integrations seamlessly.
- Large-scale 1,000,000-token context window supporting multimodal text, image, and video inputs within a single unified prompt.
MiniMax M3.1 Flash API Technical Specifications
Architecture
The MiniMax M3.1 Flash API operates as a multimodal language model with an integrated, non-disableable reasoning engine. It processes multimodal text, image, and video inputs to generate text-only outputs. In OpenAI Chat Completions mode, the MiniMax M3.1 Flash API segments internal chain-of-thought into a distinct reasoning_content field separate from the final answer content, while providing configurable effort parameters across OpenAI and Anthropic compatible interfaces.
Parameters
While exact parameter counts remain proprietary prior to public weight availability, the MiniMax M3.1 Flash API is built for extreme throughput and efficiency, delivering vendor-reported speeds reaching up to 200+ tokens per second with a typical P50 exceeding 170 tokens per second.
Capabilities
- Multimodal input comprehension spanning text, high-resolution images, and video files.
- Ultra-long context evaluation across up to 1,000,000 tokens for massive document or code repository analysis.
- High-accuracy tool calling, computer use, and autonomous agent orchestration via the MiniMax M3.1 Flash API.
- Configurable reasoning effort controls (low, medium, high, xhigh, max) to tune generation depth to task requirements.
Limitations
- The MiniMax M3.1 Flash API does not support native audio inputs or media generation capabilities such as image or video synthesis.
- Always-on reasoning cannot be completely disabled on the MiniMax M3.1 Flash API, requiring at least low reasoning effort for all requests.
MiniMax M3.1 Flash API Performance
Strengths
- Vendor-reported software engineering performance reaching 73.7% on DeepSWE v1.1.
- Strong desktop agent and computer use capability, demonstrating 61.7 on OSWorld V2.
- High cybersecurity and tool bench effectiveness with vendor results of 82% on CyberGym and 76.2 on BankerToolBench.
- Rapid token generation speeds reaching 200+ TPS with a P50 of 170+ TPS.
Real-world Effectiveness
In real-world agent benchmarks reported by MiniMax, the MiniMax M3.1 Flash API exhibits dependable execution across autonomous software engineering and environment interaction, scoring 29.6 on Agents' Last Exam. Its vendor-reported 61.7 OSWorld V2 result reflects fluid navigation of operating system tasks, while a 73.7% DeepSWE v1.1 score highlights competent repository debugging. High inference velocity exceeding 170 P50 TPS ensures that the MiniMax M3.1 Flash API maintains low latency during sequential tool calls.
MiniMax M3.1 Flash API When to Use
Scenarios
- You have an enterprise software repository with complex pull requests requiring automated bug triage and patch generation. The MiniMax M3.1 Flash API fits this scenario through its 1,000,000-token context capacity and demonstrated 73.7% DeepSWE v1.1 benchmark capability. You gain reliable, automated code repair across full codebases without context degradation.
- You have multi-step desktop automation and operating system workflows requiring UI navigation. The MiniMax M3.1 Flash API is ideal due to its proven OSWorld V2 performance of 61.7 and native support for visual inputs paired with agentic computer use. You achieve resilient UI element identification, rapid screen sequence processing, and consistent action execution.
- You have complex multimodal auditing workflows involving multi-hour video recordings and dense technical documents. The MiniMax M3.1 Flash API excels by ingesting text, images, and video simultaneously into a massive context window with always-on reasoning. You obtain high-throughput visual verification and thorough logical inspection at speeds exceeding 170 P50 TPS.
Best Practices
- Adjust the reasoning effort parameter across low, medium, high, xhigh, and max in the MiniMax M3.1 Flash API to balance execution speed with depth of agent reasoning.
- Inspect the separate reasoning_content field when integrating the MiniMax M3.1 Flash API via OpenAI-compatible endpoints to monitor intermediate problem-solving without altering user-facing content.
- Utilize input caching mechanisms with the MiniMax M3.1 Flash API to maximize processing efficiency on large, recurring multi-turn contexts.