Question 1

Is ChatGPT 5.4 free to use?

Accepted Answer

Free users get limited access when queries are auto-routed to the model. Full access requires a Plus subscription ($20/month) or higher.

Question 2

How does ChatGPT 5.4 compare to Claude Opus 4.6 for coding?

Accepted Answer

Claude Opus 4.6 still leads on SWE-Bench Verified (79.2% vs 77.2%). However, ChatGPT 5.4 is stronger for professional knowledge tasks, computer use, and enterprise workflows.

Question 3

What's the context window for ChatGPT 5.4?

Accepted Answer

The standard API window is 272K tokens. The 1M token context is available experimentally through Codex and the API with explicit configuration.

Question 4

Is ChatGPT 5.4 worth upgrading to?

Accepted Answer

If you're already on Plus or Team plans, the upgrade is automatic. For API users, the higher per-token cost is offset by the ~47% token efficiency improvement on many tasks. Run your own benchmarks before committing production workloads.

ChatGPT 5.4: New Features, Benchmarks, and Professional Upgrades

ChatGPT 5.4: New Features, Benchmarks, and Professional Upgrades

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