Ranking?
Alternatives?
CheaperClaude Opus 5.5high×2-10%$1.82No forced tool use+5
BetterGPT-6 Lunamedium+12%-99%$0.017Function calling only with none · Chat Completions+3
OpenMiMo v2.6 Prothinking+73%-93%$0.13Pass back reasoning_content+3CheaperGPT-6.1 Solmax+94%-64%$0.72Remove unsupported parameters+5CheaperGPT-6 Astrahigh+90%-15%$1.73Monitoring can return HTTP 403+2Claude Opus 5.5high×2-10%$1.82No forced tool use+5GPT-6.1 Solmax+94%-64%$0.72Remove unsupported parameters+5GPT-6 Astrahigh+90%-15%$1.73Monitoring can return HTTP 403+2
Muse Spark 1.3max+80%-21%$1.60Only auto tool_choice is supported+5GPT-6 Solmax+78%-48%$1.04GPT-6 Lunamedium+12%-99%$0.017Function calling only with none · Chat Completions+3Claude Haiku 5.5low+10%-99%$0.024Remove sampling parameters+5GPT-5.6 Lunahigh+20%-98%$0.044MiMo v2.6 FlashthinkingOpen+42%-97%$0.062Pass back reasoning_content+3GPT-6.1 Sollow+57%-94%$0.13Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen+73%-93%$0.13Pass back reasoning_content+3
DeepSeek V4.1 Flash 1017maxOpen+69%-87%$0.26Pass back reasoning_content · Chat Completions+4
GLM 5.3maxOpen+67%same$2.01Reasoning cannot be disabled+3
Step 5 PreviewthinkingOpen+64%-49%$1.03web_search not available · Chat Completions+2
Kimi K3maxOpen+63%same$2.00Sampling parameters are fixed+3Benchmarks
all categoriesFAQ
How much does Quasar 438B cost?›
$0.60 per 1M input tokens and $1.80 per 1M output tokens. A typical benchmark task costs about $2.02 at max effort.
Is Quasar 438B free to use?›
There is no free API; the cheapest paid price is $0.60 per 1M input tokens.
How good is Quasar 438B, and what is it best at?›
#129 of 334 in Chat & Knowledge, #54 of 132 in Coding, #55 of 133 in Agents & Tool Use, #81 of 133 in Vision & Documents. Strongest at: Knowledge.
Is Quasar 438B better than Kimi K2.6?›
On AA Intelligence Index 4.3.2, Quasar 438B scores 26.7 vs 27 — about the same. It is 153% more expensive per task.
How can I use Quasar 438B?›
Through the API of Multiverse Computing.
What is the context window of Quasar 438B?›
1M tokens.
When was Quasar 438B released? Is there a newer version?›
Released 2026-08-10. It is the current version in its line.
Is Quasar 438B open source?›
No, Quasar 438B is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.
Can Quasar 438B read images?›
No, it accepts text only.
What is Quasar 438B?›
Quasar 438B is a closed language model from Multiverse Computing, released Aug 2026.
What are the best alternatives to Quasar 438B?›
Claude Opus 5.5 (cheaper), GPT-6 Luna (better), MiMo v2.6 Pro (open weights).