Aion 3.5 Mini vs GPT-4o (2024-11-20)
Aion 3.5 Mini costs 7.1x less per output token than GPT-4o (2024-11-20) ($1.40 vs $10.00 per million). Updated October 23, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $1.40
- Coding
- No data
- Overall
- No data
- Output $/M
- $10.00
Aion 3.5 Mini or GPT-4o (2024-11-20): which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Aion 3.5 Mini for output tokens 7.1x cheaper ($1.40 vs $10.00 per million) and a larger context window (262K against 128K tokens).
No benchmark has tested both yet. Aion 3.5 Mini has none yet; GPT-4o (2024-11-20) on Aider polyglot, LiveCodeBench (Vals AI) and GSO-Bench. 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 GPT-4o (2024-11-20) has a AA Intelligence Index result, 8.4.
Directional only
Reasoning
GPQA Diamond
No call
Only GPT-4o (2024-11-20) has a GPQA Diamond result, 53.8%.
Directional only
Math
AIME
No call
Only GPT-4o (2024-11-20) has a AIME result, 11.9%.
Directional only
Knowledge
MMLU Pro
No call
Only GPT-4o (2024-11-20) has a MMLU Pro result, 72.6%.
Directional only
Long documents
Listed context window
Aion 3.5 Mini
Aion 3.5 Mini takes 262K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Aion 3.5 Mini
Aion 3.5 Mini $0.0014, GPT-4o (2024-11-20) $0.0075 per turn.
List prices
At a glance
- Coding index
- Aion 3.5 Mini not benchmarked, GPT-4o (2024-11-20) 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
- Aion 3.5 Mini $1.40 against GPT-4o (2024-11-20) $10.00 per million output tokens, 7.1x apart.
- Context window
- Aion 3.5 Mini takes 262K tokens, GPT-4o (2024-11-20) 128K.
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.
CodingDirectional onlySix of these boards feed the Vibe Coding Index5 boards measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| Aider polyglot | Not measured | 18.2% | Only GPT-4o (2024-11-20) measured |
| LiveCodeBench (Vals AI) | Not measured | 43.4% | Only GPT-4o (2024-11-20) measured |
| GSO-Bench | Not measured | 0.0% | Only GPT-4o (2024-11-20) measured |
| WeirdML | Not measured | 25.1% | Only GPT-4o (2024-11-20) measured |
| Cybench | Not measured | 12.5% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 38 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 8.4 | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| TheAgentCompany | Not measured | 8.6% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 41 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index4 boards measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 53.8% | Only GPT-4o (2024-11-20) measured |
| MMMU Pro (Vals AI) | Not measured | 62.2% | Only GPT-4o (2024-11-20) measured |
| GPQA Diamond (Epoch AI run) | Not measured | 47.9% | Only GPT-4o (2024-11-20) measured |
| VPCT | Not measured | 40.0% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 19 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index5 boards measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| AIME | Not measured | 11.9% | Only GPT-4o (2024-11-20) measured |
| MATH 500 (Vals AI) | Not measured | 74.0% | Only GPT-4o (2024-11-20) measured |
| MGSM (Vals AI) | Not measured | 90.4% | Only GPT-4o (2024-11-20) measured |
| OTIS Mock AIME | Not measured | 6.3% | Only GPT-4o (2024-11-20) measured |
| MATH level 5 | Not measured | 49.8% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 9 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index7 boards measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 72.6% | Only GPT-4o (2024-11-20) measured |
| LegalBench (Vals AI) | Not measured | 82.2% | Only GPT-4o (2024-11-20) measured |
| CaseLaw (Vals AI) | Not measured | 59.7% | Only GPT-4o (2024-11-20) measured |
| CorpFin (Vals AI) | Not measured | 45.9% | Only GPT-4o (2024-11-20) measured |
| TaxEval (Vals AI) | Not measured | 74.5% | Only GPT-4o (2024-11-20) measured |
| MortgageTax (Vals AI) | Not measured | 57.4% | Only GPT-4o (2024-11-20) measured |
| GeoBench | Not measured | 71.0% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 13 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Aion 3.5 Mini | GPT-4o (2024-11-20) | Leader |
|---|---|---|---|
| Creative writing (Lech Mazur) | Not measured | 81.8% | Only GPT-4o (2024-11-20) measured |
| Neither model has a result on the other 47 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
Aion 3.5 Mini costs less
Repository review
50K input + 3K output tokens
Aion 3.5 Mini costs less
Agent loop
200K input + 10K output tokens
Aion 3.5 Mini 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 | AionLabs Aion 3.5 Mini | OpenAI GPT-4o (2024-11-20) |
|---|---|---|
| Maker | Aion Labs | OpenAI |
| Weights | No public weights listed | No public weights listed |
| Released | September 23, 2026 | November 20, 2024 |
| Context window | 262K | 128K |
| Input $/Mtok | $0.70 | $2.50 |
| Output $/Mtok | $1.40 | $10.00 |
| 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 Aion 3.5 Mini better than GPT-4o (2024-11-20) for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Aion 3.5 Mini for output tokens 7.1x cheaper ($1.40 vs $10.00 per million) and a larger context window (262K against 128K tokens).
Which is cheaper, Aion 3.5 Mini or GPT-4o (2024-11-20)?
Aion 3.5 Mini costs $0.70 per million input tokens and $1.40 per million output tokens; GPT-4o (2024-11-20) costs $2.50 and $10.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Aion 3.5 Mini or GPT-4o (2024-11-20)?
Aion 3.5 Mini, with 262K tokens against 128K.
Has any benchmark tested both Aion 3.5 Mini and GPT-4o (2024-11-20)?
No benchmark has tested both yet. Aion 3.5 Mini has none yet; GPT-4o (2024-11-20) on Aider polyglot, LiveCodeBench (Vals AI) and GSO-Bench. Compare them on price and context instead. Data as of October 23, 2026.