GLM-5.1 vs Trinity-Large-Thinking
GLM-5.1 (2026) and Trinity-Large-Thinking (2026) are frontier-tier reasoning models from Zhipu AI and Arcee AI. GLM-5.1 ships a 200k-token context window, while Trinity-Large-Thinking ships a 256k-token context window. On Google-Proof Q&A, Trinity-Large-Thinking leads by 3 pts. On pricing, Trinity-Large-Thinking costs $0.22/1M input tokens versus $1.05/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Trinity-Large-Thinking is ~377% cheaper at $0.22/1M; pay for GLM-5.1 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | GLM-5.1 | Trinity-Large-Thinking |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and provider-routed production | reasoning-heavy apps, tool-calling agents, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 200k | 256k |
| Cheapest output | $3.50/1M tokens | $0.85/1M tokens |
| Provider routes | 5 tracked | 3 tracked |
| Shared benchmarks | 1 shared | Google-Proof Q&A leader |
Decision tradeoffs
- GLM-5.1 has broader tracked provider coverage for fallback and route flexibility.
- GLM-5.1 uniquely exposes Code execution in local model data.
- Local decision data tags GLM-5.1 for Coding, RAG, and Agents.
- Trinity-Large-Thinking holds a shared-benchmark lead on Google-Proof Q&A, ahead by 3 points.
- Trinity-Large-Thinking has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Trinity-Large-Thinking has the lower cheapest tracked output price at $0.85/1M tokens.
- Local decision data tags Trinity-Large-Thinking for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GLM-5.1
$1,715
Cheapest tracked route/tier: OpenRouter
Trinity-Large-Thinking
$389
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $1,327. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Trinity-Large-Thinking is $2.65/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Code execution before moving production traffic.
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- GLM-5.1 is $2.65/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GLM-5.1 adds Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-07 | 2026-04-01 |
| Context window | 200k | 256k |
| Parameters | 754B total, 40B active | 400B |
| Architecture | Mixture of Experts | Mixture of Experts |
| License | MITOSI-approved | Apache 2.0OSI-approved |
| Openness | Open source | Open source |
| Weights | Available | Available |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: permitted | Commercial use: permitted |
| Knowledge cutoff | 2025-11 | - |
Pricing and availability
| Pricing attribute | GLM-5.1 | Trinity-Large-Thinking |
|---|---|---|
| Input price | $1.05/1M tokens | $0.22/1M tokens |
| Output price | $3.50/1M tokens | $0.85/1M tokens |
| Providers |
Capabilities
| Capability | GLM-5.1 | Trinity-Large-Thinking |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | GLM-5.1 | Trinity-Large-Thinking |
|---|---|---|
| Google-Proof Q&A | 86.2 | 89.2 |
Continue comparing
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Popular comparisons for Trinity-Large-Thinking
Last reviewed: 2026-06-30. Data sourced from public model cards and provider documentation.