GPT-5.2 Pro vs Hermes 4 405B
Hermes 4 405B costs 56.0x less per output token than GPT-5.2 Pro ($3.00 vs $168.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $168.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $3.00
GPT-5.2 Pro or Hermes 4 405B: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick GPT-5.2 Pro for a larger context window (400K against 131K tokens).
No benchmark has tested both yet. GPT-5.2 Pro has results on Epoch Capabilities Index, ARC-AGI and ARC-AGI-2; Hermes 4 405B on AA Intelligence Index and Kagi LLM Benchmark. Compare them on price and context instead.
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
No call
Only Hermes 4 405B has a AA Intelligence Index result, 7.5.
Directional only
Long documents
Listed context window
GPT-5.2 Pro
GPT-5.2 Pro takes 400K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Hermes 4 405B
GPT-5.2 Pro $0.105, Hermes 4 405B $0.0025 per turn.
List prices
At a glance
- Coding index
- GPT-5.2 Pro not benchmarked, Hermes 4 405B not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- GPT-5.2 Pro $168.00 against Hermes 4 405B $3.00 per million output tokens, 56.0x apart.
- Context window
- GPT-5.2 Pro takes 400K tokens, Hermes 4 405B 131K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | GPT-5.2 Pro | Hermes 4 405B | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 7.5 | Only Hermes 4 405B measured |
| Epoch Capabilities Index | 156.3 | Not measured | Only GPT-5.2 Pro measured |
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index5 boards measured
| Benchmark | GPT-5.2 Pro | Hermes 4 405B | Leader |
|---|---|---|---|
| ARC-AGI | 90.5% | Not measured | Only GPT-5.2 Pro measured |
| ARC-AGI-2 | 54.2% | Not measured | Only GPT-5.2 Pro measured |
| SimpleBench | 57.4% | Not measured | Only GPT-5.2 Pro measured |
| Chess puzzles | 60.0% | Not measured | Only GPT-5.2 Pro measured |
| Kagi LLM Benchmark | Not measured | 55.8% | Only Hermes 4 405B measured |
| Neither model has a result on the other 17 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | GPT-5.2 Pro | Hermes 4 405B | Leader |
|---|---|---|---|
| FrontierMath, tiers 1 to 3 | 74.0% | Not measured | Only GPT-5.2 Pro measured |
| FrontierMath, tier 4 | 46.0% | Not measured | Only GPT-5.2 Pro measured |
| Neither model has a result on the other 11 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
Hermes 4 405B costs less
Repository review
50K input + 3K output tokens
Hermes 4 405B costs less
Agent loop
200K input + 10K output tokens
Hermes 4 405B 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 | OpenAI GPT-5.2 Pro | Nous Hermes 4 405B |
|---|---|---|
| Maker | OpenAI | Nous Research |
| Weights | No public weights listed | Open weights |
| Released | December 10, 2025 | August 26, 2025 |
| Context window | 400K | 131K |
| Input $/Mtok | $21.00 | $1.00 |
| Output $/Mtok | $168.00 | $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 GPT-5.2 Pro better than Hermes 4 405B for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-5.2 Pro for a larger context window (400K against 131K tokens).
Which is cheaper, GPT-5.2 Pro or Hermes 4 405B?
GPT-5.2 Pro costs $21.00 per million input tokens and $168.00 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, GPT-5.2 Pro or Hermes 4 405B?
GPT-5.2 Pro, with 400K tokens against 131K.
Has any benchmark tested both GPT-5.2 Pro and Hermes 4 405B?
No benchmark has tested both yet. GPT-5.2 Pro has results on Epoch Capabilities Index, ARC-AGI and ARC-AGI-2; Hermes 4 405B on AA Intelligence Index and Kagi LLM Benchmark. Compare them on price and context instead. Data as of October 22, 2026.