Best AI Models to Use with OpenClaw in 2026 (Claude vs GPT-4o vs Gemini)

OpenClaw supports any AI model that exposes a compatible API — which in practice means Claude (Anthropic), GPT-4o (OpenAI), and Gemini (Google). Picking the right one affects your agent's speed, cost, and capability profile.

Here's a practical breakdown based on real usage, not benchmark marketing.

The Short Version

| Model | Best for | API cost | Speed | |---|---|---|---| | Claude Sonnet 4 | Reasoning, writing, complex tasks | Medium | Fast | | GPT-4o | General purpose, tool use | Medium | Fast | | Gemini 2.0 Flash | Speed, volume, budget | Low | Very fast | | Claude Opus 4 | Hardest tasks | High | Slower |

For most people running a personal OpenClaw agent: Gemini 2.0 Flash for high-volume everyday tasks, Claude Sonnet 4 for anything requiring careful reasoning or writing.

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Claude (Anthropic)

Model IDs for OpenClaw: anthropic/claude-sonnet-4-6, anthropic/claude-opus-4-6

Claude is widely considered the best model for agentic tasks — tasks where the AI needs to take sequences of actions, make decisions, and recover from errors. Anthropic specifically trained Claude with safety and tool-use in mind, and it shows.

Strengths:

• Excellent at multi-step reasoning
• Strong at writing (emails, documents, code)
• Reliably follows complex instructions
• Very good at knowing when to stop and ask for clarification vs. proceeding

Weaknesses:

• More expensive than Gemini
• Occasionally over-cautious

Best for: Email drafting, document analysis, coding tasks, anything requiring nuanced judgment.

Config:

openclaw config set agents.defaults.model.primary "anthropic/claude-sonnet-4-6"

Auth-profiles.json key:

"anthropic:default": { "type": "api_key", "provider": "anthropic", "key": "sk-ant-..." }

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GPT-4o (OpenAI)

Model ID for OpenClaw: openai/gpt-4o

GPT-4o is OpenAI's flagship multimodal model. It's fast, capable, and has the most tool integrations in the broader ecosystem. If you're already paying for ChatGPT Plus, you can use the same API key.

Strengths:

• Excellent at tool use and function calling
• Strong code generation
• Very well-rounded
• Massive community — most OpenClaw tutorials assume GPT-4o

Weaknesses:

• Slightly weaker than Claude on extended reasoning chains
• API costs add up at volume

Best for: General-purpose tasks, coding, anything where you want broad capability without tuning.

Config:

openclaw config set agents.defaults.model.primary "openai/gpt-4o"

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Gemini 2.0 Flash (Google)

Model ID for OpenClaw: google/gemini-2.0-flash

Gemini Flash is the surprise winner for everyday OpenClaw use. It's dramatically cheaper than Claude or GPT-4o, significantly faster, and good enough for the vast majority of tasks a personal AI agent handles.

Strengths:

• Extremely fast (sub-second responses)
• Very cheap (often 10–20× cheaper than Claude per token)
• Good at summarization, scheduling, and retrieval tasks
• Native Google integration (Calendar, Gmail, Search)

Weaknesses:

• Not as strong on complex reasoning tasks
• Can be overconfident on ambiguous instructions

Best for: High-volume tasks (email summarization, notifications, quick lookups), anything where speed and cost matter more than depth.

Config:

openclaw config set agents.defaults.model.primary "google/gemini-2.0-flash"

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How to Switch Models on OpenClaw

Switching models requires updating the config and restarting the gateway:

openclaw config set agents.defaults.model.primary "google/gemini-2.0-flash"
openclaw gateway restart

You also need the corresponding API key in your auth-profiles.json. You can have multiple providers configured simultaneously and switch between them without changing the key file.

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Which Model Does SimplifyClaw Use?

With SimplifyClaw, you pick your model during the 60-second setup and can switch it at any time from your dashboard — no terminal, no config files, no restart required.

All three providers are supported. If you're not sure where to start, Gemini Flash is a solid default: fast, cheap, and reliable for everyday tasks. You can always switch to Claude for more demanding work.

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