Llama Nemotron Ultra 253BvsQwen3.8-Flash-Next
Llama Nemotron Ultra 253B | Qwen3.8-Flash-Next | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | 253B | 125B |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | — | 262k |
| Benchmarks | ||
LiveCodeBenchCompetitive coding — Coding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | 66.3% | 91.9% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 76% | 91.7% |
| BenchmarksPublished by one model only | ||
SWE-Bench ProAgentic coding — Can the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | — | 62.5% |
SWE-Bench MultilingualMultilingual coding — Like SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | — | 81% |
DeepSWE 1.1Agentic coding — Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | — | 58.7% |
NL2Repo-BenchRepo-level code generation — Tests whether the AI can turn a natural-language requirement into working code across an entire repository, not just produce a single function or patch. Higher is better. | — | 48.1% |
JobBenchProfessional tool use — Tests the AI on professional workplace tasks that require using real work tools — the kind of multi-step jobs an office worker handles. Higher is better. | — | 55.7% |
CoWorkBenchLong-horizon office work — Tests long-running office tasks across fields including computer science, finance, law, medicine, and other productivity work. Higher is better. | — | 73.9% |
Toolathlon-VerifiedPersonal tool use — Tests how well the AI uses everyday personal tools and apps to get things done — a human-checked version of Toolathlon. Higher is better. | — | 73.5% |
Humanity's Last Exam · no toolsMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | — | 35.9% |
IFBenchInstruction following — Tests whether the AI can follow detailed instructions and satisfy multiple constraints at once. Higher is better. | — | 81.3% |
OSWorld 2.0Agentic computer use — Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Version 2.0 is a harder, refreshed task set. Higher is better. | — | 19.4% |
Agent's Last Exam · pass@1Agentic computer use — A hard set of desktop and operating-system tasks an AI agent has to finish by looking at the screen and working the machine itself. The score is the share it passes outright — partial credit does not count. Higher is better. | — | 24.3% |
Agent's Last Exam · scoreAgentic computer use — The graded score on the same desktop and operating-system tasks in Agent's Last Exam, giving partial credit for progress beyond the strict pass-or-fail result. Higher is better. | — | 51.2% |
CharXiv ReasoningChart reasoning — Can the AI read and reason about complex charts and figures, not just text? Higher is better. | — | 84.6% |
LVBenchVideo understanding — Can the AI follow a very long video — up to an hour — and answer questions that need details from far apart in it? Higher is better. | — | 76.6% |
| Overview | ||
| Company | NVIDIA | Qwen |
| Release date | Apr 8 2025 | Aug 26 2026 |
| Access | Open Weight | Open Weight |
Other comparisons
Llama Nemotron Ultra 253BvsClaude Opus 5Qwen3.8-Flash-NextvsClaude Opus 5Llama Nemotron Ultra 253BvsGPT-5.6 SolQwen3.8-Flash-NextvsGPT-5.6 SolLlama Nemotron Ultra 253BvsGemini 3.7 FlashQwen3.8-Flash-NextvsGemini 3.7 FlashLlama Nemotron Ultra 253BvsMuse GlimmerQwen3.8-Flash-NextvsMuse GlimmerLlama Nemotron Ultra 253BvsGrok 4.6Qwen3.8-Flash-NextvsGrok 4.6Llama Nemotron Ultra 253BvsDeepSeek-V4-Pro-0813Qwen3.8-Flash-NextvsDeepSeek-V4-Pro-0813
Frequently asked questions
Qwen3.8-Flash-Next leads Llama Nemotron Ultra 253B on 2 of the 2 benchmarks they both report (LiveCodeBench, GPQA Diamond). Llama Nemotron Ultra 253B shipped 505 days before Qwen3.8-Flash-Next, so benchmark comparisons should account for the intervening progress.
Llama Nemotron Ultra 253B has 253B parameters, while Qwen3.8-Flash-Next has 125B.
On LiveCodeBench, Qwen3.8-Flash-Next leads at 91.9% vs Llama Nemotron Ultra 253B at 66.3%. On GPQA Diamond, Qwen3.8-Flash-Next leads at 91.7% vs Llama Nemotron Ultra 253B at 76%.
Llama Nemotron Ultra 253B was released by NVIDIA on Apr 8 2025.
Qwen3.8-Flash-Next was released by Qwen on Aug 26 2026.
Qwen3.8-Flash-Next leads on LiveCodeBench — Llama Nemotron Ultra 253B 66.3% vs Qwen3.8-Flash-Next 91.9%.
Qwen3.8-Flash-Next leads on GPQA Diamond — Llama Nemotron Ultra 253B 76% vs Qwen3.8-Flash-Next 91.7%.