---
title: "Cheapest Models for OpenClaw: Cut API Costs by 90% (2026)"
description: "The cheapest way to run OpenClaw. MiniMax M2.5 costs $0.30/M tokens — 50x less than Claude Opus. Full pricing comparison with setup."
date: 2026-02-07
updatedDate: 2026-03-12
location: San Francisco, CA – Feb 7th, 2026
image: /images/cheapest-models-openclaws-hero.jpg
keywords: cheapest openclaw models, openclaw api costs, cheap llm models, minimax m2.5, gpt-oss-120b, openclaw pricing
models:
  - provider: minimax
    slug: minimax-m2.5
    name: MiniMax M2.5
    note: Cheap, fast workhorse for everyday OpenClaw traffic.
  - provider: minimax
    slug: minimax-m2.1
    name: MiniMax M2.1
    note: Older but stable; useful for cost-tier comparison.
  - provider: anthropic
    slug: claude-opus-4-5-20251101
    name: Claude Opus 4.5
    note: Premium baseline used to anchor the cost comparison.
  - provider: openai
    slug: gpt-5.4
    name: GPT-5.4
    note: Frontier-tier reference for "what you'd pay otherwise".
faq:
  - question: "What are the cheapest AI models for OpenClaw?"
    answer: "MiniMax M2.5 (~$0.30/M tokens) and GPT-OSS-120b (~$0.50/M tokens) are the cheapest high-quality models for OpenClaw. By routing 80% of volume to M2.5 and saving GPT-OSS for tougher jobs, most users see their OpenClaw bill drop by 60-90%."
  - question: "How much can I save on OpenClaw API costs?"
    answer: "Typical savings are 60-90% compared to using a single premium model. For example, GPT-4.5 costs ~$75/M tokens while MiniMax M2.5 costs ~$0.30/M tokens — a 250x difference for tasks where quality is comparable."
---

Running OpenClaw can get expensive fast. If you're posting frequently, automating replies, or scaling your bot operations, those API calls add up — sometimes hitting $100+ per day before you notice.

Here's the good news: you don't need to pay premium prices for premium results.

## The Two Cheapest Models for OpenClaw

After testing dozens of models against OpenClaw workloads, two stand out for their combination of quality, speed, and cost:

### MiniMax M2.5

MiniMax M2.5 has become a favorite for high-volume OpenClaw operations. It handles conversational tasks, reply generation, and everyday dialogue with surprising competence — often matching more expensive models on straight-line tasks.

**Why it works for OpenClaw:**
- Fast response times (critical for bot operations)
- Excellent at understanding context in short exchanges
- Consistently ranked among the lowest-cost-per-token models available

### GPT-OSS-120b

OpenSource GPT-120b (often called GPT-OSS-120b) brings OpenAI-style reasoning to your OpenClaw without the OpenAI pricing. It's larger than M2.5 and shines when you need more nuanced understanding or complex multi-turn conversations.

**Use it when:**
- You need higher reasoning quality
- The conversation thread gets complex
- You want GPT-4-level outputs at a fraction of the cost

## Try Both Models on Haimaker

Haimaker.ai offers both MiniMax M2.5 and GPT-OSS-120b at competitive rates. Sign up and start routing in minutes.

**What you get:**
- Full access to MiniMax M2.5 and GPT-OSS-120b
- Automatic routing between models based on your needs
- Same API format you're already using

## Why Most People Overpay for OpenClaw

The trap most OpenClaw users fall into is using the same model for every task. But not every reply needs Opus 4.5-level reasoning.

A quick status check? Cheaper model. A one-line acknowledgment? Even cheaper. A complex customer support situation? That's when you route to a more capable model.

Haimaker's routing engine lets you set rules based on:
- Task complexity
- Token limits
- Latency requirements
- Cost targets

## How Much Can You Save?

Here's a rough comparison based on typical OpenClaw usage patterns:

| Model | Cost per 1M tokens | Best for |
|-------|-------------------|----------|
| GPT-4.5 | ~$75 | Complex reasoning, multi-turn |
| GPT-4o | ~$10 | Mid-tier tasks |
| MiniMax M2.5 | ~$0.30 | High-volume, simple tasks |
| GPT-OSS-120b | ~$0.50 | Quality reasoning at scale |

By routing 80% of your volume to M2.5 and saving GPT-OSS for tougher jobs, most users see their OpenClaw bill drop by 60-90%.

## Getting Started

1. Sign up at [haimaker.ai](https://haimaker.ai)
2. Point your OpenClaw config at the Haimaker API — or [wire it up in one command](/connect) with `npx -y @haimaker/connect --openclaw`
3. Set up routing rules for your workload

<a href="https://haimaker.ai?utm_source=openclaw_blog&utm_medium=cta&utm_campaign=cheapest-models" class="cta-button">TRY FOR FREE</a>

## The Bottom Line

If you're running OpenClaw at scale and paying premium prices, you're throwing money away. MiniMax M2.5 and GPT-OSS-120b deliver 90%+ of the quality at 1-10% of the cost.

Just your OpenClaw API key and a willingness to cut costs.

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*Last updated March 2026. Pricing reflects current rates on haimaker.ai.*