Aion 3.5 measured on 2 of 8 Writing & Language benchmarks2
BenchmarkByScoreRank
No benchmark matches
Alternatives?
ModelScoreCostPer taskWhat changes
CheaperGLM 5.3unstatedOpen+8%-43%$1.40 / $4.40Reasoning cannot be disabled+3
BetterGPT-6 Astraunstated+13%+433%$10 / $50Monitoring can return HTTP 403+2
OpenKimi K3unstated+8%+60%$3 / $15Sampling parameters are fixed+3
CheaperGrok 4.7unstated+4%-20%$2 / $6Reasoning cannot be disabled+4
CheaperMuse Spark 1.1unstated-0%-47%$1.25 / $4.25Only n=1 · Meta / Chat Completions+1ModelScoreCostPer taskWhat changes
GLM 5.3unstatedOpen+8%-43%$1.40 / $4.40Reasoning cannot be disabled+3Grok 4.7unstated+4%-20%$2 / $6Reasoning cannot be disabled+4Muse Spark 1.1unstated-0%-47%$1.25 / $4.25Only n=1 · Meta / Chat Completions+1ModelScoreCostPer taskWhat changes
GPT-6 Astraunstated+13%+433%$10 / $50Monitoring can return HTTP 403+2
Claude Fable 5.1unstated+12%+433%$10 / $50Replace forced tool_choice+5Claude Opus 5unstated+11%+167%$5 / $25GPT-6 Solunstated+10%+7%$2 / $10Kimi K3unstatedOpen+8%+60%$3 / $15Sampling parameters are fixed+3ModelScoreCostPer taskWhat changes
Kimi K3unstatedOpen+8%+60%$3 / $15Sampling parameters are fixed+3GLM 5.3unstatedOpen+8%-43%$1.40 / $4.40Reasoning cannot be disabled+3
Qwen3.8 2.4T A95BunstatedOpen-4%-20%$2 / $6max_tokens range · QwenCloud+4Muse Glimmer 30BunstatedOpen-7%-87%$0.30 / $1.10Context: 262K → 131KGLM 5.2unstatedOpen-9%-43%$1.40 / $4.40Benchmarks
in Writing & LanguageEQ-Bench Creative Writing v31,929.3#11
FAQ
How much does Aion 3.5 cost?›
$3 per 1M input tokens and $6 per 1M output tokens; cached input $0.75 per 1M.
Is Aion 3.5 free to use?›
There is no free API; the cheapest paid price is $3 per 1M input tokens.
How good is Aion 3.5, and what is it best at?›
#9 of 95 in Writing & Language.
Is Aion 3.5 better than Claude Fable 5?›
On EQ-Bench Creative Writing v3, Aion 3.5 scores 1,929.3 vs 1,943.1 — lower.
How can I use Aion 3.5?›
Through the API of AionLabs.
What is the context window of Aion 3.5?›
262K tokens, with up to 33K output tokens.
Can Aion 3.5 read images?›
No, it accepts text only.
What is Aion 3.5?›
Aion 3.5 is a language model from aion-labs.
What are the best alternatives to Aion 3.5?›
GLM 5.3 (cheaper), GPT-6 Astra (better), Kimi K3 (open weights).