Claude Mythos 5.1 vs Gemini 3.8 Flash Cyber
Why this pair: Restricted-access cybersecurity models from Google and Anthropic
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Claude Mythos 5.1 | Gemini 3.8 Flash Cyber |
|---|---|---|
| Developer | Anthropic | Google DeepMind |
| Family | Claude 5 1 | Gemini 3 |
| Model | Claude Mythos 5.1 | Gemini 3.8 Flash Cyber |
| Version | Claude Mythos 5.1 | Gemini 3.8 Flash Cyber |
| Lifecycle | active | active |
| Released | 2026-09-01 | 2026-09-02 |
| Knowledge cutoff | 2026-06-01 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 1,000,000 | Unknown |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | No |
| Self-hostable | No | No |
| Provider access | Anthropic (Project Glasswing) | Unknown |
| Capabilities | chat, generation, reasoning, tools | automated-patching, cybersecurity, reasoning, vulnerability-detection |
12 comparable fields · 8 material differences · Editorially curated pair passes the primary-source comparison gate
Claude Mythos 5.1 Capabilities
Gemini 3.8 Flash Cyber Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Fable 5.1Anthropic | vs | Claude Mythos 5.1Anthropic | family variantsimage, text |
Claude Fable 5Anthropic | vs | Claude Mythos 5.1Anthropic | family variantsimage, text |
Claude Mythos 5.1Anthropic | vs | Claude Opus 5Anthropic | family variantsimage, text |
Claude Mythos 5.1Anthropic | vs | Claude Sonnet 5Anthropic | family variantsimage, text |
Claude Mythos 5.1Anthropic | vs |  GPT-5.6 SolOpenAI | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Claude Mythos 5.1Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
Gemini 3.8 FlashGoogle DeepMind | vs | Gemini 3.8 Flash CyberGoogle DeepMind | family variantstext |
Claude Mythos 5.1Anthropic | vs |  Qwen3.7 MaxQwen | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs | GPT-4.1OpenAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Mythos 5.1 vs Gemini 3.8 Flash Cyber FAQs
Is Claude Mythos 5.1 or Gemini 3.8 Flash Cyber better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Mythos 5.1 and Gemini 3.8 Flash Cyber, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Mythos 5.1 or Gemini 3.8 Flash Cyber?+
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 Gemini 3.8 Flash Cyber?+
Neither model has a larger sourced context window in this comparison. Claude Mythos 5.1 is 1,000,000 and Gemini 3.8 Flash Cyber is —.
Which performs better in benchmarks, Claude Mythos 5.1 or Gemini 3.8 Flash Cyber?+
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 Gemini 3.8 Flash Cyber be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Mythos 5.1 is not marked open weight; Gemini 3.8 Flash Cyber is not marked open weight.
Can Claude Mythos 5.1 and Gemini 3.8 Flash Cyber understand images?+
Claude Mythos 5.1 is documented with image input; Gemini 3.8 Flash Cyber is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Mythos 5.1 or Gemini 3.8 Flash Cyber?+
Neither has a larger sourced maximum output. Claude Mythos 5.1 is 128,000 and Gemini 3.8 Flash Cyber is —.
Do Claude Mythos 5.1 and Gemini 3.8 Flash Cyber support reasoning and tool use?+
Claude Mythos 5.1: reasoning, tool calling, and image input. Gemini 3.8 Flash Cyber: reasoning. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Mythos 5.1 or Gemini 3.8 Flash Cyber?+
Claude Mythos 5.1 has 1 sourced provider route; Gemini 3.8 Flash Cyber has 0, so Claude Mythos 5.1 has broader tracked availability.
Which offers better value, Claude Mythos 5.1 or Gemini 3.8 Flash Cyber?+
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.