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AI coding agents: GPT-5.5, Claude Sonnet 4.6, Gemini 3.5 Flash compared

By PulseAugur Editorial · [1 sources] ·

A recent comparison evaluated three AI coding agents: OpenAI's Codex (powered by GPT-5.5), Anthropic's Claude Code (using Claude Sonnet 4.6), and Google's Antigravity (with Gemini 3.5 Flash). The experiment focused on real-world engineering tasks to determine which agent performed best. GPT-5.5 excelled in terminal command execution, Claude Sonnet 4.6 led in SWE-Bench for production code tasks, and Gemini 3.5 Flash demonstrated superior multi-tool orchestration capabilities and speed. AI

IMPACT Provides comparative performance data to help developers choose the most effective AI coding agent for specific tasks.

RANK_REASON The cluster compares performance benchmarks of different AI models for coding tasks, presented in an article format. [lever_c_demoted from research: ic=1 ai=1.0]

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AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

AI coding agents: GPT-5.5, Claude Sonnet 4.6, Gemini 3.5 Flash compared

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
The cluster compares performance benchmarks of different AI models for coding tasks, presented in an article format. [lever_c_demoted from research: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, paper
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
128 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Towards AI TIER_1 English(EN) · Devashish Datt Mamgain ·

    Claude Code vs Codex vs Antigravity: Which AI Coding Agent Should You Use?

    <p>Every AI coding tool in 2026 claims to make developers faster. But which one actually performs best on a real engineering task?</p><p>My engineering team uses AI coding tools daily. We got curious about whether the marketing matched reality, especially for a generation of tool…

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