GPT-5.5 Is Out — Here's How to Use It in OpenClaw

OpenAI announced GPT-5.5 today — rolling out across ChatGPT Plus, Pro, Business, Enterprise, and Codex starting April 23. It's the second major OpenAI model release in a month (following GPT-5.4) and comes directly in response to competitive pressure from Anthropic's Claude Opus 4.7 and Mythos Preview.

For OpenClaw users, this is straightforward: GPT-5.5 is available via the OpenAI API and you can switch to it in about 30 seconds. Here's what changed and whether it's worth doing.

What GPT-5.5 Actually Improved

OpenAI's announcement focused on three areas:

Agentic task handling — "Give it a messy, multi-part task and trust it to plan, use tools, check its work, navigate through ambiguity, and keep going." This is direct language targeting OpenClaw-style agent workloads.
Reduced token usage for coding — specifically calls out "significantly fewer tokens necessary for Codex tasks." For OpenClaw setups doing code-heavy work, this means lower API costs per session.
Strongest safeguards to date — OpenAI's framing; means better refusal handling and reduced harmful output rates. For personal assistants, this usually shows up as fewer frustrating refusals on edge cases.

Context: GPT-5.5 ships alongside Claude Opus 4.7, Claude Mythos Preview, and a growing field of alternatives (Kimi K2.5, MiniMax M2.7, ILMU-Nemo-Nano). The model race is accelerating. OpenClaw's model-agnostic architecture means you're not locked into any of them.

How to Configure GPT-5.5 in OpenClaw

If you're already running OpenClaw with an OpenAI API key, switching to GPT-5.5 is a one-line config change:

# In ~/.openclaw/openclaw.json
{
  "models": {
    "default": "openai/gpt-5.5"
  },
  "providers": {
    "openai": {
      "apiKey": "sk-..."
    }
  }
}

Then restart your gateway:

openclaw gateway restart

That's it. If you want to keep GPT-5.5 for specific tasks only (e.g., coding sub-agents) while using a different model as your primary, OpenClaw supports per-task model routing:

# Route coding tasks to GPT-5.5, everything else to your default
{
  "models": {
    "default": "anthropic/claude-opus-4-7",
    "coding": "openai/gpt-5.5"
  }
}

Is It Worth Switching?

Depends what you're doing. Here's the honest comparison as of April 23, 2026:

Model	Best For	Cost Profile	Status
GPT-5.5	Agentic tasks, coding, multi-step planning	Mid-high (fewer tokens vs GPT-5.4)	New today
Claude Opus 4.7	Reasoning, writing, nuanced instruction-following	High	Current best overall for most OpenClaw setups
Kimi K2.5	Price/performance — community top pick	Low	Best value Apr 2026
MiniMax M2.7	Budget alternative, 97% skill adherence	Very low	Strong for skill-heavy workloads
Local (Qwen, Ollama)	Privacy, offline use, zero API cost	Free (hardware only)	Best for sensitive data, always-on agents

If you're running Claude Opus 4.7 as your primary — no need to switch. Opus 4.7 remains the best general-purpose model for complex OpenClaw workloads. GPT-5.5's agentic improvements are meaningful but not a leap over Opus 4.7.

If you're running GPT-5.4 — yes, update. The token efficiency improvement for coding tasks alone is worth it, and you won't see any degradation elsewhere.

If you're on Kimi K2.5 for cost reasons — stay. GPT-5.5 is better but costs more. Kimi K2.5 remains the community's top price/performance pick for April 2026.

API availability note

GPT-5.5 is rolling out via the OpenAI API starting April 23. The model ID is gpt-5.5 (confirm in the OpenAI models page if you're hitting errors). The "Pro" version (extended reasoning, higher context) is available on Business and Enterprise API tiers.

The Bigger Picture: Model Cadence Is Accelerating

GPT-5.4 was a month ago. GPT-5.5 is today. Anthropic shipped Opus 4.7 and Mythos Preview in the same window. The model release cadence in 2026 has become almost weekly.

For OpenClaw users, this is actually an advantage. Because OpenClaw connects to models via API keys rather than platform subscriptions, you can move to a new model the day it's available — no waiting for a managed product to integrate it, no plan tier requirement. Today's new model is a config line change and a gateway restart.

This is the same argument as the Claude Code Pro removal: managed platforms make you dependent on their release timelines and access decisions. Self-hosters stay current on their own schedule.

Quick tip: If you're testing a new model and not sure it's better for your use case, configure it as a secondary model and test it on a few tasks before making it your default. OpenClaw's per-task model routing makes A/B testing models trivially easy — you don't have to commit fully to find out if it's worth switching.

Not sure which model to run for your setup?

Model selection is one of the things we cover in every ClawReady setup. We look at your use case, budget, and privacy requirements and recommend the right model (or model mix) for your specific workflow.

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Summary

GPT-5.5 launched April 23, 2026 — better agentic task handling, fewer tokens for coding, stronger safeguards. Configure it in OpenClaw by setting openai/gpt-5.5 as your model and restarting the gateway.

If you're on GPT-5.4, update now. If you're on Claude Opus 4.7 or Kimi K2.5, you can try it as a secondary model but don't need to switch your primary. The model race is moving fast — OpenClaw's model-agnostic setup means you can always move with it.