Claude Mythos 5.1 vs SmolVLA 450M
At a Glance
| Compare | Claude Mythos 5.1Anthropic |  SmolVLA 450MHugging Face LeRobot |
|---|---|---|
| Pricing and Limits | ||
| Context windowMaximum documented tokens | 1,000K | Not reported |
| Model facts checked | Sep 2, 2026View model evidence → | Aug 29, 2026View model evidence → |
Available Benchmarks
Side-by-Side Facts
| Field | Claude Mythos 5.1 | SmolVLA 450M |
|---|---|---|
| Developer | Anthropic | Hugging Face LeRobot |
| Family | Claude 5 1 | SmolVLA |
| Model | Claude Mythos 5.1 | SmolVLA 450M |
| Version | Claude Mythos 5.1 | 450M |
| Lifecycle | active | active |
| Released | 2026-09-01 | 2025-06-03 |
| Knowledge cutoff | 2026-06-01 | Unknown |
| Input modalities | Text, Image | Text, Image, Robot state |
| Output modalities | Text | Robot action |
| Context window | 1,000K | Unknown |
| Total parameters | Unknown | 450M |
| Active parameters | Unknown | Unknown |
| License | Unknown | apache-2.0 |
| Open weights | No | Yes |
| API available | Yes | No |
| Self-hostable | No | Yes |
| Provider access | Anthropic (Project Glasswing) | Unknown |
| Capabilities | chat, generation, reasoning, tools | asynchronous-inference, fine-tuning, low-cost-hardware, manipulation |
| Robotics model type | Unknown | Vision-language-action model |
| Action representation | Unknown | Continuous action chunks from a flow-matching action expert |
| Control architecture | Unknown | SmolVLM2 backbone with flow-matching action expert |
| Inference location | Unknown | On device |
| Native control rate (Hz) | Unknown | Unknown |
| Supported embodiments | Unknown | SO-100, SO-101, LeKiwi, LIBERO Franka |
| Training data | Unknown | Compatibly licensed LeRobot community datasets totaling fewer than 30,000 episodes in the cited release. |
Claude Mythos 5.1 Capabilities
SmolVLA 450M Capabilities
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Claude Mythos 5.1Anthropic | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Claude Mythos 5.1Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Claude Mythos 5.1Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Mythos 5.1 vs SmolVLA 450M FAQs
Is Claude Mythos 5.1 or SmolVLA 450M better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Mythos 5.1 and SmolVLA 450M, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Mythos 5.1 or SmolVLA 450M?+
Only Claude Mythos 5.1 has a directly sourced input price: $10.00 per million tokens. Only Claude Mythos 5.1 has a directly sourced output price: $50.00 per million tokens.
Which has a larger context window, Claude Mythos 5.1 or SmolVLA 450M?+
Neither model has a larger sourced context window in this comparison. Claude Mythos 5.1 is 1,000K and SmolVLA 450M is —.
Which performs better in benchmarks, Claude Mythos 5.1 or SmolVLA 450M?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Mythos 5.1 or SmolVLA 450M be self-hosted?+
SmolVLA 450M is the only model in this pair currently marked as self-hostable. Claude Mythos 5.1 is not marked open weight; SmolVLA 450M is open weight.
Can Claude Mythos 5.1 and SmolVLA 450M understand images?+
Claude Mythos 5.1 is documented with image input; SmolVLA 450M is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Mythos 5.1 or SmolVLA 450M?+
Neither has a larger sourced maximum output. Claude Mythos 5.1 is 128K and SmolVLA 450M is —.
Do Claude Mythos 5.1 and SmolVLA 450M support reasoning and tool use?+
Claude Mythos 5.1: reasoning, tool calling, and image input. SmolVLA 450M: image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Mythos 5.1 or SmolVLA 450M?+
Claude Mythos 5.1 has 1 sourced provider route; SmolVLA 450M has 0, so Claude Mythos 5.1 has broader tracked availability.
Which offers better value, Claude Mythos 5.1 or SmolVLA 450M?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.