GLM-5.1 vs OpenAI GPT OSS Safeguard 120B
GLM-5.1 (2026) and OpenAI GPT OSS Safeguard 120B (2025) are frontier reasoning models from Zhipu AI and OpenAI. GLM-5.1 ships a 200k-token context window, while OpenAI GPT OSS Safeguard 120B ships a not-yet-sourced context window. On pricing, OpenAI GPT OSS Safeguard 120B costs $0.15/1M input tokens versus $0.98/1M 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.
OpenAI GPT OSS Safeguard 120B is ~553% cheaper at $0.15/1M; pay for GLM-5.1 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | GLM-5.1 | OpenAI GPT OSS Safeguard 120B |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and provider-routed production | general production evaluation |
| Decision fit | Coding, RAG, and Agents | Classification and JSON / Tool use |
| Context window | 200k | — |
| Cheapest output | $3.08/1M tokens | $0.60/1M tokens |
| Provider routes | 5 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- GLM-5.1 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GLM-5.1 has broader tracked provider coverage for fallback and procurement flexibility.
- GLM-5.1 uniquely exposes Reasoning, Function calling, and Tool use in local model data.
- Local decision data tags GLM-5.1 for Coding, RAG, and Agents.
- OpenAI GPT OSS Safeguard 120B has the lower cheapest tracked output price at $0.60/1M tokens.
- Local decision data tags OpenAI GPT OSS Safeguard 120B for Classification and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GLM-5.1
$1,554
Cheapest tracked route/tier: Z.ai
OpenAI GPT OSS Safeguard 120B
$270
Cheapest tracked route/tier: AWS Bedrock
Estimated monthly gap: $1,284. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for GLM-5.1 and OpenAI GPT OSS Safeguard 120B; plan for SDK, billing, or endpoint changes.
- OpenAI GPT OSS Safeguard 120B is $2.48/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning, Function calling, and Tool use before moving production traffic.
- No overlapping tracked provider route is sourced for OpenAI GPT OSS Safeguard 120B and GLM-5.1; plan for SDK, billing, or endpoint changes.
- GLM-5.1 is $2.48/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GLM-5.1 adds Reasoning, Function calling, and Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-07 | 2025-09-01 |
| Context window | 200k | — |
| Parameters | 754B total, 40B active | 120B |
| Architecture | mixture of experts | - |
| License | MIT | Proprietary |
| Knowledge cutoff | 2025-11 | 2024-06 |
Pricing and availability
| Pricing attribute | GLM-5.1 | OpenAI GPT OSS Safeguard 120B |
|---|---|---|
| Input price | $0.98/1M tokens | $0.15/1M tokens |
| Output price | $3.08/1M tokens | $0.60/1M tokens |
| Providers |
Capabilities
| Capability | GLM-5.1 | OpenAI GPT OSS Safeguard 120B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on reasoning mode: GLM-5.1, function calling: GLM-5.1, tool use: GLM-5.1, and code execution: GLM-5.1. Both models share structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, GLM-5.1 lists $0.98/1M input and $3.08/1M output tokens on the cheapest tracked provider, while OpenAI GPT OSS Safeguard 120B lists $0.15/1M input and $0.60/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts OpenAI GPT OSS Safeguard 120B lower by about $1.32 per million blended tokens. Availability is 5 providers versus 1, so concentration risk also matters.
Choose GLM-5.1 when coding workflow support and broader provider choice are central to the workload. Choose OpenAI GPT OSS Safeguard 120B when provider fit and lower input-token cost are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which is cheaper, GLM-5.1 or OpenAI GPT OSS Safeguard 120B?
OpenAI GPT OSS Safeguard 120B is cheaper on tracked token pricing. GLM-5.1 costs $0.98/1M input and $3.08/1M output tokens. OpenAI GPT OSS Safeguard 120B costs $0.15/1M input and $0.60/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is GLM-5.1 or OpenAI GPT OSS Safeguard 120B open source?
GLM-5.1 is listed under MIT. OpenAI GPT OSS Safeguard 120B is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for reasoning mode, GLM-5.1 or OpenAI GPT OSS Safeguard 120B?
GLM-5.1 has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, GLM-5.1 or OpenAI GPT OSS Safeguard 120B?
GLM-5.1 has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, GLM-5.1 or OpenAI GPT OSS Safeguard 120B?
GLM-5.1 has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run GLM-5.1 and OpenAI GPT OSS Safeguard 120B?
GLM-5.1 is available on Z.ai, OpenRouter, Fireworks AI, Vercel AI Gateway, and Novita AI. OpenAI GPT OSS Safeguard 120B is available on AWS Bedrock. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-25. Data sourced from public model cards and provider documentation.