How's ChatGPT 5.4 Pro vs Opus 4.6? Need anecdotal evidence

A viral discussion on Reddit, sparked by a heavy Anthropic user, is putting the spotlight on the intensifying competition between top-tier AI models. The user, frustrated by what they describe as a 100x reduction in usage limits for Claude Code within the Claude Opus 4.6 model, is actively considering a switch to OpenAI's ChatGPT 5.4 Pro subscription. This highlights a critical pain point for power users: platform reliability and consistent access to high-performance features, especially for demanding tasks like coding and scientific analysis.

The core of the debate centers on a direct, feature-for-feature comparison. The original poster is specifically asking for anecdotal evidence from users who have experience with both Claude Opus 4.6 and ChatGPT 5.4 Pro. Key evaluation criteria include raw performance for coding and science tasks, the practical application of rate limits and usage caps, and overall workflow efficiency. This grassroots benchmarking reflects how professional users are making real-world purchasing decisions based on tangible output and access, not just marketing claims.

This user sentiment is a significant data point for both companies. For Anthropic, it's a warning that aggressive limit enforcement on their most capable Opus model could drive their core technical user base to competitors. For OpenAI, it represents an opportunity to capture market share by emphasizing the stability and capacity of the ChatGPT 5.4 Pro tier. The conversation underscores that in the enterprise and prosumer AI space, consistent utility and access are as important as peak benchmark performance.