Claude Mythos Preview vs GLM-5V-Turbo
Claude Mythos Preview (2026) and GLM-5V-Turbo (2026) are frontier-tier reasoning models from Anthropic and Zhipu AI. Claude Mythos Preview ships a 1M-token context window, while GLM-5V-Turbo ships a 200k-token context window. On pricing, GLM-5V-Turbo costs $1.2/1M input tokens versus $25/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
GLM-5V-Turbo is ~1983% cheaper at $1.2/1M; pay for Claude Mythos Preview only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude Mythos Preview | GLM-5V-Turbo |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 1M | 200k |
| Cheapest output | $125/1M tokens | $4/1M tokens |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Claude Mythos Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Claude Mythos Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Claude Mythos Preview uniquely exposes Code execution in local model data.
- Local decision data tags Claude Mythos Preview for Coding, RAG, and Agents.
- GLM-5V-Turbo has the lower cheapest tracked output price at $4/1M tokens.
- Local decision data tags GLM-5V-Turbo for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Claude Mythos Preview
$51,250
Cheapest tracked route: Anthropic
GLM-5V-Turbo
$1,960
Cheapest tracked route: OpenRouter
Estimated monthly gap: $49,290. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Claude Mythos Preview and GLM-5V-Turbo; plan for SDK, billing, or endpoint changes.
- GLM-5V-Turbo is $121/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Code execution before moving production traffic.
- No overlapping tracked provider route is sourced for GLM-5V-Turbo and Claude Mythos Preview; plan for SDK, billing, or endpoint changes.
- Claude Mythos Preview is $121/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Mythos Preview adds Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-07 | 2026-04-01 |
| Context window | 1M | 200k |
| Parameters | — | 744B total, 40B active |
| Architecture | decoder only | mixture of experts |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-12 | - |
Pricing and availability
| Pricing attribute | Claude Mythos Preview | GLM-5V-Turbo |
|---|---|---|
| Input price | $25/1M tokens | $1.2/1M tokens |
| Output price | $125/1M tokens | $4/1M tokens |
| Providers |
Capabilities
| Capability | Claude Mythos Preview | GLM-5V-Turbo |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on code execution: Claude Mythos Preview. Both models share vision, multimodal input, reasoning mode, and function calling, 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, Claude Mythos Preview lists $25/1M input and $125/1M output tokens, while GLM-5V-Turbo lists $1.2/1M input and $4/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts GLM-5V-Turbo lower by about $52.96 per million blended tokens. Availability is 2 providers versus 1, so concentration risk also matters.
Choose Claude Mythos Preview when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose GLM-5V-Turbo when vision-heavy evaluation 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 has a larger context window, Claude Mythos Preview or GLM-5V-Turbo?
Claude Mythos Preview supports 1M tokens, while GLM-5V-Turbo supports 200k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Mythos Preview or GLM-5V-Turbo?
GLM-5V-Turbo is cheaper on tracked token pricing. Claude Mythos Preview costs $25/1M input and $125/1M output tokens. GLM-5V-Turbo costs $1.2/1M input and $4/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Mythos Preview or GLM-5V-Turbo open source?
Claude Mythos Preview is listed under Proprietary. GLM-5V-Turbo 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 vision, Claude Mythos Preview or GLM-5V-Turbo?
Both Claude Mythos Preview and GLM-5V-Turbo expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Claude Mythos Preview or GLM-5V-Turbo?
Both Claude Mythos Preview and GLM-5V-Turbo expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run Claude Mythos Preview and GLM-5V-Turbo?
Claude Mythos Preview is available on Anthropic and Microsoft Foundry. GLM-5V-Turbo is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-05-16. Data sourced from public model cards and provider documentation.