LongCat 2.0 vs Hermes 4 405B
LongCat 2.0 leads Hermes 4 405B on the Artificial Analysis Intelligence Index, 19.1 to 7.5, and LongCat 2.0 costs 2.5x less per output token ($1.20 vs $3.00 per million). Updated October 22, 2026; 1 benchmarks have a result for both.
LongCat 2.0 or Hermes 4 405B: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick LongCat 2.0 for output tokens 2.5x cheaper ($1.20 vs $3.00 per million) and a larger context window (1.05M against 131K tokens).
- Shared results
- 1
- LongCat 2.0 only
- 7
- Hermes 4 405B only
- 1
- Like-for-like categories
- 1 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
LongCat 2.0
LongCat 2.0 leads, 19.1 against 7.5.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only LongCat 2.0 has a AA Agentic Index result, 14.0.
Directional only
Long documents
Listed context window
LongCat 2.0
LongCat 2.0 takes 1.05M tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
LongCat 2.0
LongCat 2.0 $0.0009, Hermes 4 405B $0.0025 per turn.
List prices
At a glance
- Coding index
- LongCat 2.0 not benchmarked, Hermes 4 405B not benchmarked.
- Widest category
- Intelligence, 11.6 points apart on average over 1 shared benchmark.
- Widest single gap
- AA Intelligence Index: LongCat 2.0 19.1 against Hermes 4 405B 7.5, 11.6 points apart on a 0 to 100 scale.
- Output price
- LongCat 2.0 $1.20 against Hermes 4 405B $3.00 per million output tokens, 2.5x apart.
- Context window
- LongCat 2.0 takes 1.05M tokens, Hermes 4 405B 131K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | LongCat 2.0 | Bars | Hermes 4 405B | Ties |
|---|---|---|---|---|
| Intelligence | 1 | 0 | ||
| All shared boards | 1 | 0 |
CodingDirectional onlySix of these boards feed the Vibe Coding Index3 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| AA Coding Index | 45.3 | Not measured | Only LongCat 2.0 measured |
| SciCode | 36.3% | Not measured | Only LongCat 2.0 measured |
| ALE-Bench | 793.5 | Not measured | Only LongCat 2.0 measured |
| Neither model has a result on the other 40 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| AA Intelligence Index | 19.1 | 7.5 | LongCat 2.0 |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| AA Agentic Index | 14.0 | Not measured | Only LongCat 2.0 measured |
| Neither model has a result on the other 41 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | 78.0% | Not measured | Only LongCat 2.0 measured |
| Humanity's Last Exam (Artificial Analysis run) | 33.7% | Not measured | Only LongCat 2.0 measured |
| Kagi LLM Benchmark | Not measured | 55.8% | Only Hermes 4 405B measured |
| Neither model has a result on the other 20 boards here | |||
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| Neither model has a result on 14 boards here | |||
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| Neither model has a result on 20 boards here | |||
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| Neither model has a result on 9 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| Long context reasoning (AA-LCR) | 65.0% | Not measured | Only LongCat 2.0 measured |
| Neither model has a result on the other 47 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | LongCat 2.0 | Hermes 4 405B | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
LongCat 2.0 costs less
Repository review
50K input + 3K output tokens
LongCat 2.0 costs less
Agent loop
200K input + 10K output tokens
LongCat 2.0 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Meituan LongCat 2.0 | Nous Hermes 4 405B |
|---|---|---|
| Maker | Meituan | Nous Research |
| Weights | Open weights | Open weights |
| Released | July 20, 2026 | August 26, 2025 |
| Context window | 1.05M | 131K |
| Input $/Mtok | $0.30 | $1.00 |
| Output $/Mtok | $1.20 | $3.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is LongCat 2.0 better than Hermes 4 405B for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick LongCat 2.0 for output tokens 2.5x cheaper ($1.20 vs $3.00 per million) and a larger context window (1.05M against 131K tokens).
Which is cheaper, LongCat 2.0 or Hermes 4 405B?
LongCat 2.0 costs $0.30 per million input tokens and $1.20 per million output tokens; Hermes 4 405B costs $1.00 and $3.00. Cost per solved task is known for neither of them.
Which has the bigger context window, LongCat 2.0 or Hermes 4 405B?
LongCat 2.0, with 1.05M tokens against 131K.
How many benchmarks is the LongCat 2.0 vs Hermes 4 405B comparison based on?
1 benchmarks have a result for both models as of October 22, 2026. LongCat 2.0's coding index rests on 0 independent benchmarks and Hermes 4 405B's on 0. Where only one model has a result, the page says so instead of naming a winner.