Model comparison
Claude Mythos 5 vs Hy3 Preview
Head-to-head evidence from 5 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Mythos 5 #1 (Supported); Hy3 Preview unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and Hy3 Preview share 5 comparable benchmark results. 3 of 8 categories are comparable. 10 results are unique to Claude Mythos 5; 17 to Hy3 Preview.
Updated July 23, 2026- Shared results
- 5
- Claude Mythos 5 only
- 10
- Hy3 Preview only
- 17
- Comparable categories
- 3 / 8
Treat this as a split decision. Claude Mythos 5 makes more sense if knowledge is the priority or you need the larger 1M+ context window; Hy3 Preview is the better fit if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 5 shared benchmark results across 3 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Mythos 5 and Hy3 Preview finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Claude Mythos 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Hy3 Preview. That is roughly Infinityx on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 256K for Hy3 Preview.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Mythos 5 | Δ | Hy3 Preview |
|---|---|---|---|
| Knowledge | Claude Mythos 568.5 | Margin← 34.7 | Hy3 Preview33.8 |
| Agentic | Claude Mythos 587.0 | Margin← 32.6 | Hy3 Preview54.4 |
| Coding | Claude Mythos 589.7 | Margin← 31.9 | Hy3 Preview57.8 |
| Math | Claude Mythos 597.6 | MarginNo overlap | Hy3 PreviewNot measured |
| Multimodal | Claude Mythos 593.5 | MarginNo overlap | Hy3 PreviewNot measured |
| Inst. Following | Claude Mythos 5Not measured | MarginNo overlap | Hy3 Preview63.1 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
HLE
KnowledgeA 64.5%B 25.5%Winner: Claude Mythos 5Δ 39HLE: Claude Mythos 5 scored 64.5%; Hy3 Preview scored 25.5%. Claude Mythos 5 wins this benchmark. - Source ↗
Terminal-Bench 2.0
AgenticA 88%B 54.4%Winner: Claude Mythos 5Δ 33.6Terminal-Bench 2.0: Claude Mythos 5 scored 88%; Hy3 Preview scored 54.4%. Claude Mythos 5 wins this benchmark. - Source ↗
SWE-bench Verified
CodingA 95.5%B 74.4%Winner: Claude Mythos 5Δ 21.1SWE-bench Verified: Claude Mythos 5 scored 95.5%; Hy3 Preview scored 74.4%. Claude Mythos 5 wins this benchmark. - Source ↗
GPQA
KnowledgeA 94.1%B 87.2%Winner: Claude Mythos 5Δ 6.9GPQA: Claude Mythos 5 scored 94.1%; Hy3 Preview scored 87.2%. Claude Mythos 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Mythos 5 | Hy3 Preview | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | Hy3 Preview$0 input / $0 output | Hy3 Preview has the lower combined listed price. |
| Generation speedtokens per second | Claude Mythos 5Not available | Hy3 PreviewNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | Hy3 PreviewNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | Hy3 Preview256K | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Mythos 5 wins8 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 88% | 54.4% | Claude Mythos 5 leads |
| OSWorld-VerifiedSource | 85% | — | Not comparable |
| BrowseCompSource | 88% | — | Not comparable |
| ExploitGymSource | 17.5% | — | Not comparable |
| Gert LabsSource | — | 36.91% | Not comparable |
| AA Agentic IndexSource | — | 30.7% | Not comparable |
| GDPval-AASource | — | 35.7% | Not comparable |
| GDPval-AASource | — | 1214 | Not comparable |
CodingClaude Mythos 5 wins6 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 95.5% | 74.4% | Claude Mythos 5 leads |
| SWE-bench ProSource | 80.3% | — | Not comparable |
| Terminal-Bench 2.0Source | 88.0% | 54.4% | Claude Mythos 5 leads |
| SciCodeSource | — | 41.2% | Not comparable |
| AA-SciCodeSource | — | 47.6% | Not comparable |
| AA Coding IndexSource | — | 58.8% | Not comparable |
Reasoning2 benchmarks
KnowledgeClaude Mythos 5 wins10 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| GPQASource | 94.1% | 87.2% | Claude Mythos 5 leads |
| HLESource | 64.5% | 25.5% | Claude Mythos 5 leads |
| HLE w/o toolsSource | 59% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 41.2% | Not comparable |
| GPQA-DSource | — | 87.2% | Not comparable |
| AA-Omniscience AccuracySource | — | 31.5% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 73.0% | Not comparable |
| AA-GPQA DiamondSource | — | 89.7% | Not comparable |
| AA-HLESource | — | 31.6% | Not comparable |
| AA-Omniscience IndexSource | — | -18.5% | Not comparable |
Math1 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| USAMO 2026Source | 97.6% | — | Not comparable |
Multilingual1 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| SWE MultilingualSource | 92.2% | — | Not comparable |
Multimodal3 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Mythos 5 | Hy3 Preview | Result |
|---|---|---|---|
| IFBenchSource | — | 63.1% | Not comparable |
Frequently Asked Questions (4)
Which is better, Claude Mythos 5 or Hy3 Preview?
Claude Mythos 5 and Hy3 Preview are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for knowledge tasks, Claude Mythos 5 or Hy3 Preview?
Claude Mythos 5 has the edge for knowledge tasks in this comparison, averaging 68.5 versus 33.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for coding, Claude Mythos 5 or Hy3 Preview?
Claude Mythos 5 has the edge for coding in this comparison, averaging 89.7 versus 57.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Claude Mythos 5 or Hy3 Preview?
Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 54.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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