# Claude Opus 4.5 vs. GLM-5.2 > Source: > Published: 2026-06-25 09:21:42+00:00 ### Claude Opus 4.5 vs GLM-5.2 # Claude Opus 4.5 vs GLM-5.2 Claude Opus 4.5 (2025) and GLM-5.2 (2026) are frontier-tier reasoning models from Anthropic and Zhipu AI. Claude Opus 4.5 ships a **200k-token context window**, while GLM-5.2 ships a **1M-token context window**. On SWE-bench Pro, GLM-5.2 leads by **20.3 points**. On pricing, GLM-5.2 costs **$1.40/1M input tokens** versus **$5/1M** 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. ``` Bottom line: GLM-5.2 is ~257% cheaper at $1.40/1M input tokens. Pay for Claude Opus 4.5 only when coding workflow support or multimodal vision is a hard requirement. ``` ## Decision Scorecard | Signal | Claude Opus 4.5 | GLM-5.2 | How to read it | |---|---|---|---| Best for | Reasoning-heavy apps, multimodal apps, and tool-calling agents | Reasoning-heavy apps, tool-calling agents, and long-context analysis | Use-case synthesis from product type, capability flags, context, and provider data. | Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents | Primary workload tags from local decision data. | Context window | 200k | 1M | Higher is better when prompts, retrieval chunks, or transcripts are large. | Cheapest output | $25/1M tokens | $4.40/1M tokens | Cheapest tracked provider route; verify your exact region and tier. | Provider routes | 6 tracked | 1 tracked | Broader coverage can reduce vendor lock-in and fallback risk. | Shared benchmarks | 2 shared | SWE-bench Pro leader | Visible benchmark lead is 20.3 points on SWE-bench Pro. | ### Get GoPeek Open links without creating new tabs. Available on Edge and Firefox. Chrome support coming soon. [ Microsoft Edge Add to Edge — free → ](https://microsoftedge.microsoft.com/addons/detail/gopeek/ffaeanmhghmohbponokefmbhfkkomnmk) [ Mozilla Firefox Add to Firefox — free → ](https://addons.mozilla.org/en-US/firefox/addon/gopeek/) ## Pricing at a Glance ## Monthly Cost at Traffic Estimate token spend from the cheapest tracked input and output route or tier. Assumes **1M requests/month**, **800 input tokens/request**, and **250 output tokens/request**. #### Lower Estimate — GLM-5.2 Wins **$8,030** Batch, cache, alternate speed tiers, and negotiated pricing excluded. ## Decision Tradeoffs #### Choose Claude Opus 4.5 when... - You need broader tracked provider coverage for fallback and procurement flexibility (6 routes). - Vision and Multimodal capabilities are a hard requirement — Claude uniquely exposes these in local model data. - Your workload is tagged for Coding, RAG, and Agents and you need Anthropic's tool-calling ecosystem. #### Choose GLM-5.2 when... - You want the shared-benchmark lead on SWE-bench Pro, ahead by 20.3 points. - You need the larger context window (1M tokens) for long prompts, retrieval packs, or transcript analysis. - You want the lower cheapest tracked output price at $4.40/1M tokens. - Your workload is tagged for Coding, RAG, and Agents and cost efficiency is the priority. ## Switch Friction ### Claude Opus 4.5 → GLM-5.2 Provider overlap exists on **OpenRouter**; start route-level A/B tests there. GLM-5.2 is **$20.60/1M tokens lower** on cheapest tracked output pricing before cache, batch, or negotiated discounts. Check replacement coverage for Vision and Multimodal before moving production traffic. ### GLM-5.2 → Claude Opus 4.5 Provider overlap exists on OpenRouter; start route-level A/B tests there. Claude Opus 4.5 is **$20.60/1M tokens higher** on cheapest tracked output pricing, so quality gains need to justify the spend. Claude Opus 4.5 adds Vision and Multimodal in local capability data. ## Which Should You Choose? For most production workloads — especially coding, RAG, and agentic systems — **GLM-5.2 is the pragmatic choice**. It wins on cost (~72% cheaper input, ~82% cheaper output), context length (5x larger), and coding benchmarks (SWE-bench Pro). The $8,030/month savings at 1M requests is hard to ignore. Choose **Claude Opus 4.5** only when multimodal vision, broader provider redundancy, or specific Anthropic ecosystem integrations are non-negotiable. ### Get GoPeek Open links without creating new tabs. Available on Edge and Firefox. Chrome support coming soon. [ Microsoft Edge Add to Edge — free → ](https://microsoftedge.microsoft.com/addons/detail/gopeek/ffaeanmhghmohbponokefmbhfkkomnmk) [ Mozilla Firefox Add to Firefox — free → ](https://addons.mozilla.org/en-US/firefox/addon/gopeek/)