AI tool comparison
DeepSeek V4 vs GLM-5.1
Which one should you ship with? Here is the side-by-side panel verdict, pricing read, reviewer split, and community vote comparison.
Open Source Models
DeepSeek V4
1.6T open-source MoE that nearly matches frontier — MIT, 1M token context
75%
Panel ship
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Community
Paid
Entry
DeepSeek V4 dropped April 24, 2026 as two production-ready Mixture-of-Experts models: V4-Pro (1.6T parameters, 49B activated) and V4-Flash (284B parameters, 13B activated). Both support 1 million token context and ship under the MIT license — the most permissive option in AI. The architecture innovation is the hybrid attention mechanism combining Compressed Sparse Attention (CSA) and Heavily Compressed Attention (HCA), which slashes long-context inference costs dramatically. At 1M tokens, V4-Pro requires only 27% of the FLOPs and 10% of the KV cache compared to DeepSeek V3.2 — a meaningful efficiency gain that makes million-token context economically viable. Performance-wise, DeepSeek V4-Pro beats all rival open models on math and coding benchmarks, trailing only Google's Gemini 3.1-Pro (closed) on world knowledge. One year after V2 upended the industry, DeepSeek has done it again — a model approaching frontier performance that anyone can run, modify, and ship commercially with zero licensing friction.
AI Models
GLM-5.1
First open-source model to top SWE-bench Pro — 744B MoE, MIT, zero Nvidia
50%
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Community
Paid
Entry
GLM-5.1 is Z.ai's (formerly Zhipu AI) open-weight model released April 7, 2026 under the MIT license. It's a 744-billion-parameter Mixture-of-Experts architecture with 40 billion active parameters per token, a 200K-token context window, and a 131K maximum output length — and it became the first open-source model ever to lead SWE-bench Pro, scoring 58.4% versus Claude Opus 4.6's 57.3%. The training story is almost as remarkable as the performance. GLM-5.1 was trained entirely on approximately 100,000 Huawei Ascend 910B chips using the MindSpore framework — no Nvidia hardware was used at any point. That makes it one of the first frontier-tier models to demonstrate that the CUDA monoculture isn't technically mandatory for training state-of-the-art models. Z.ai became the first publicly traded foundation model company via a Hong Kong IPO in January 2026 (~$558M raised). The model is free to download from HuggingFace and also available via API at $0.95 per million input tokens. In agentic demonstrations, it has run autonomously for eight hours straight — 655 planning and execution iterations — without human checkpoints.
Reviewer scorecard
“MIT license on a 1M context model that beats GPT-5 on coding evals is wild. V4-Flash at 13B active params is particularly practical — you get near-frontier coding performance with inference costs that don't require a mortgage. Ship immediately.”
“MIT license, top SWE-bench Pro score, $0.95/M via API. If your use case is agentic coding and you're not evaluating GLM-5.1, you're leaving real performance on the table. The 8-hour autonomous run capability is compelling for long-horizon task pipelines.”
“Running 1.6T parameters requires infrastructure most companies don't have, and DeepSeek's API has had reliability issues before. The 'MIT license' is less useful when you're dependent on their API anyway. Wait for quantized local versions to stabilize.”
“SWE-bench Pro is one benchmark. The broader coding composite (Terminal-Bench 2.0 + NL2Repo) still has Claude Opus 4.6 ahead at 57.5 vs GLM-5.1's 54.9. Running 744B locally requires hardware most teams don't own, and the API's Chinese jurisdiction will trigger compliance blockers for many organizations.”
“The efficiency breakthrough is the story. If 1M-token context now costs 73% less to serve, that changes the economics of an entire class of applications. DeepSeek is compressing the frontier timeline faster than anyone predicted a year ago.”
“The Huawei chip training story matters more than the benchmark ranking. If GLM-5.1 proves you can train frontier models without Nvidia at scale, it fractures the GPU supply chain narrative that's been shaping geopolitics and AI policy discussions for years. This is a proof of concept with enormous implications.”
“A million-token context means I can feed an entire brand style guide, all past campaign materials, and a full brief into one call. V4-Flash is fast enough for real-time creative iteration. This is now my go-to for long-context creative workflows.”
“For creative workflows, the 744B MoE overhead is overkill and local deployment requires datacenter-grade hardware that's nowhere near indie studio territory. The MIT license is great, but the gap between 'free to download' and 'free to actually run' is vast at this parameter count.”
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