3 posts tagged with "Comparison"

Recently, the Codex conversation has been less about a new model and more about one recurring action: resetting usage limits.

Sometimes the reset follows an incident. Sometimes it follows a cache or accounting problem, a product launch, or a user milestone. The five-hour limit has also disappeared from some interfaces, leaving only the weekly balance. Meanwhile, paid users have repeatedly seen their weekly allowance restored. Claude reset five-hour and weekly limits for all users on the same day GPT-5.6 launched.

Then Codex leader Tibo Sottiaux replied to Claude's announcement with three words: “I smell fear.”

It was an excellent screenshot. But beneath the joke is a more important shift: in the agent era, quotas, resets, and rate limits have moved from backend infrastructure into the product experience itself.

OpenAI released GPT-5.6 Sol, Terra, and Luna on July 10, 2026, and the interesting part is not just that another frontier model arrived. It is that OpenAI is now making the model family itself part of the developer workflow.

For Claude Code users, the useful question is not "is GPT-5.6 better than Claude?" That is too vague to help anyone ship software.

The better question is: which layer of work is each model trying to own?

OpenAI's answer is clear. Sol is the strongest reasoning and agent model, Terra is the faster coding workhorse, and Luna is the high-throughput batch option. Early community feedback on X, Reddit, and developer forums is still noisy, but the shape of the conversation is already familiar: excitement around coding and agents, skepticism around cost, and a lot of "show me on my repo" energy.

The AI coding landscape has dramatically evolved in 2025, with both Anthropic's Claude Code and OpenAI's revamped Codex offering compelling but fundamentally different approaches to AI-assisted development. After OpenAI's surprising discontinuation of the original Codex in 2023, the company has returned with a completely reimagined system, while Claude Code has solidified its position as a premier development partner. Let's dive into the definitive comparison for 2025.

The Great Comeback: OpenAI Codex Returns​

Before we compare, it's crucial to understand that the OpenAI Codex available in 2025 is completely different from the original 2021 version that was deprecated in March 2023. The new Codex isn't just a model—it's a full autonomous software engineering agent powered by codex-1, a specialized version of OpenAI's o3 model optimized for software engineering tasks.