Claude Mythos Preview vs MiniMax M2 / M2.5
Which one should you pick? Here's the full breakdown.
Claude Mythos Preview
Anthropic's most capable model -- a gated research preview via Project Glasswing, cybersecurity-specialized. 73% success on expert CTF tasks, 32-step autonomous network attacks. Not generally available.
MiniMax M2 / M2.5
MiniMax's open-weights frontier -- first open model to match Claude Opus 4.6 on SWE-Bench at 10-20× lower cost
| Category | Claude Mythos Preview | MiniMax M2 / M2.5 |
|---|---|---|
| Ease of Use | 2.0 | 6.5 |
| Output Quality | 10.0 | 9.0 |
| Value | 5.0 | 9.5 |
| Features | 9.0 | 8.5 |
| Overall | 6.5 | 8.4 |
Personality & Tone
Claude Mythos Preview: The gated red-team specialist
Tone: When Anthropic does publish Mythos outputs (in sanitized research reports), the voice is careful, technically dense, and deliberately unperformed -- much more 'senior security researcher writing an internal memo' than Claude Opus's conversational style.
Quirks: Mythos is tuned to produce its cybersecurity reasoning with extensive show-your-work traces. Anthropic publishes some outputs with full CoT visible as evidence of capability claims. Outside of security tasks, the model reportedly sounds much like Opus 4.6 / 4.7 -- Anthropic hasn't published a distinct general-purpose voice for Mythos.
MiniMax M2 / M2.5: The Chinese multimodal generalist
Tone: Expressive and media-rich. MiniMax's chat models lean into long, formatted responses and handle voice and image prompts more naturally than most pure-text peers.
Quirks: Strong multimodal story; text-only quality is good but not class-leading versus DeepSeek or Qwen. Like other Chinese models, careful on domestic political topics.
Pricing Comparison
| Feature | Claude Mythos Preview | MiniMax M2 / M2.5 |
|---|---|---|
| Free Tier | No | Yes |
| Starting Price | Invite only | $0 |
Benchmark Head-to-Head
MiniMax M2.5 (230B/10B active MoE) benchmarks — Claude Mythos Preview has no published benchmarks
| Benchmark | Description | Score |
|---|---|---|
| MMLU-Pro | Harder multi-subject reasoning | 82.1% |
| GPQA Diamond | Graduate-level science questions | 76.8% |
| SWE-Bench Verified | 80.2% | |
| HumanEval | Python code generation | 91% |
| AIME 2025 | 85.3% |
Which Should You Pick?
Pick Claude Mythos Preview if...
- ✓Higher output quality (10 vs 9)
Partner organizations in Project Glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage. If your use case is legitimate cybersecurity and you have enterprise Anthropic contact, ask about Glasswing admission.
Visit Claude Mythos PreviewPick MiniMax M2 / M2.5 if...
- ✓Easier to use (6.5 vs 2)
- ✓Better value for money (9.5/10)
- ✓Has a free tier
Agentic coding and tool-use workflows on a budget. Best price-to-SWE-Bench ratio of any open-weights model in 2026.
Visit MiniMax M2 / M2.5Our Verdict
MiniMax M2 / M2.5 is the clear winner here with 8.4/10 vs 6.5/10. Claude Mythos Preview isn't bad, but MiniMax M2 / M2.5 outperforms it across the board. Pick Claude Mythos Preview only if partner organizations in project glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage.