Claude Mythos Preview’s headline result is a reported 93.9% on SWE bench Verified, but Anthropic lists it as an invitation only Project Glasswing research preview, not a broadly available model.
Claude Opus 4.7 is the first model to test when quality matters most: VentureBeat has it ahead of GPT 5.5 and DeepSeek V4 on HLE, and CodeRouter gives it 64.3% on SWE Bench Pro [3][16].
LLM Stats says Claude Opus 4.7 leads 6 of the 10 overlapping benchmarks while GPT 5.5 leads 4, but the scores are mostly provider reported at a high reasoning tier; BenchLM also says overlapping data is stil...
Public benchmarks do not support a single overall winner: BenchLM gives DeepSeek V4 Flash High the coding lead, 72.2 versus 58.6, while GPT 5.5 leads agentic tasks, 81.8 versus 55.4 [13].
There is no overall winner: Claude Opus 4.7 leads GPT 5.5 on SWE Bench Pro, 64.3% to 58.6%, while GPT 5.5 leads on Terminal Bench 2.0, 82.7% to 69.4%.[14]
On the clearest coding comparison, DeepSeek's DS V4 Pro Max is listed at 93.5 on LiveCodeBench(Pass@1), ahead of Kimi K2.6 Thinking at 89.6, though the table comes from DeepSeek's Hugging Face materials [18]...
There is no clean all around winner: GPT 5.5 has official OpenAI scores of 82.7% on Terminal Bench 2.0 and 58.6% on SWE Bench Pro, while Claude Opus 4.7 leads several third party coding figures [24][4].
GPT 5.5 has the clearest wins in the cited ARC and Terminal Bench rows, including 85% on ARC AGI 2 and 82.7% on Terminal Bench 2.0.[1][3]
On the 10 benchmarks both providers report, Claude Opus 4.7 leads on 6 and GPT 5.5 leads on 4, so the better model depends on the workload rather than a single overall ranking.
For practical coding and repository fixes, Kimi K2.6 is the safer first test: AkitaOnRails scored it 87 in Tier A, versus 78 for DeepSeek V4 Flash and 69 for DeepSeek V4 Pro[8].
There is not enough like for like public evidence to rank all four models fairly; Claude Opus 4.7 scores 57 on Artificial Analysis, GPT 5.5 xhigh is reported as leading at 60, and LLM Stats shows the two tra...
Claude Opus 4.7 leads GPQA Diamond at 94.2% and Humanity’s Last Exam without tools at 46.9%, while GPT 5.5 leads Terminal Bench 2.0 at 82.7% and GPT 5.5 Pro leads HLE with tools and BrowseComp [6].