Claude Code is the better documented fit for codebase aware local development and granular permissions; OpenAI Codex is the better documented fit for enterprise rollout, governance, and pricing.
GPT 5.5 has the strongest aggregate signal, with Artificial Analysis listing GPT 5.5 xhigh at 60 and high at 59; Claude Opus 4.7 wins several shared reasoning and software engineering rows, DeepSeek V4 is th...
There is no defensible overall winner from the available public evidence. Claude Opus 4.7 has the strongest official documentation, including a 1M context window at standard API pricing, while DeepSeek V4 ha...
There is no single benchmark king: Claude Opus 4.7 leads GPQA Diamond, Humanity’s Last Exam without tools and SWE Bench Pro; GPT 5.5 Pro leads tool enabled HLE and BrowseComp; GPT 5.5 leads Terminal Bench 2....
There is no clean 1 to 4 ranking: the public numbers come from different benchmarks and settings.
GPT 5.5 is easier to evaluate for production API use because OpenAI publishes the model ID, 1M token context, 128K max output, $5/$30 per 1M tokens pricing and official tool support [22].
There is no clean overall winner: GPT 5.5 leads Terminal Bench 2.0 at 82.7% versus 69.4%, while Claude Opus 4.7 leads SWE Bench Pro at 64.3% versus 58.6% [5][11].
There is no clean overall champion: GPT 5.5 leads the visible Artificial Analysis Intelligence Index entries at 60 and 59, while Claude Opus 4.7 leads key reasoning heavy scores such as GPQA Diamond and Huma...
There is no clean overall winner: Claude Opus 4.7 leads reported SWE bench Pro results at 64.3% versus GPT 5.5 at 58.6%, while GPT 5.5 leads Terminal Bench 2.0 at 82.7% versus 69.4% [6][14][34].
Claude Opus 4.7 has the stronger SWE bench numbers in one third party comparison: 87.6% SWE bench Verified and 64.3% SWE bench Pro, versus 80.6% and 55.4% for DeepSeek V4 Pro [28].
Do not treat the four models as a single clean ranking: the most complete shared table covers Claude Opus 4.7, GPT 5.5/GPT 5.5 Pro and DeepSeek V4 Pro Max, while Kimi K2.6 evidence is split across separate s...
Start with GPT 5.5 if you need the strongest all round candidate; test Claude Opus 4.7 first for long research and document heavy work; look at DeepSeek V4 for cost sensitive scale; and shortlist Kimi K2.6 f...