GPT-5.3-Codex-SparkvsQwen3.8-Flash-Next
GPT-5.3-Codex-Spark | 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. | — | 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. | 128k | 262k |
| 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% |
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. | — | 91.9% |
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% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 91.7% |
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 | OpenAI | Qwen |
| Release date | Feb 12 2026 | Aug 26 2026 |
| Access | Proprietary | Open Weight |
Other comparisons
GPT-5.3-Codex-SparkvsClaude Opus 5Qwen3.8-Flash-NextvsClaude Opus 5GPT-5.3-Codex-SparkvsGemini 3.7 FlashQwen3.8-Flash-NextvsGemini 3.7 FlashGPT-5.3-Codex-SparkvsMuse GlimmerQwen3.8-Flash-NextvsMuse GlimmerGPT-5.3-Codex-SparkvsGrok 4.6Qwen3.8-Flash-NextvsGrok 4.6GPT-5.3-Codex-SparkvsDeepSeek-V4-Pro-0813Qwen3.8-Flash-NextvsDeepSeek-V4-Pro-0813GPT-5.3-Codex-SparkvsMistral Medium 3.5Qwen3.8-Flash-NextvsMistral Medium 3.5
Frequently asked questions
GPT-5.3-Codex-Spark and Qwen3.8-Flash-Next don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5.3-Codex-Spark shipped 195 days before Qwen3.8-Flash-Next, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (GPT-5.3-Codex-Spark) vs 262k (Qwen3.8-Flash-Next). GPT-5.3-Codex-Spark is proprietary, while Qwen3.8-Flash-Next is open weight.
Direct benchmark comparisons are unavailable — GPT-5.3-Codex-Spark and Qwen3.8-Flash-Next don't publish scores on any of the same benchmarks.
GPT-5.3-Codex-Spark was released by OpenAI on Feb 12 2026.
Qwen3.8-Flash-Next was released by Qwen on Aug 26 2026.
GPT-5.3-Codex-Spark has a 128k context window; Qwen3.8-Flash-Next has 262k.
GPT-5.3-Codex-Spark is a proprietary model released by OpenAI. Qwen3.8-Flash-Next is an open weight model released by Qwen.