Inference
EN
Multiverse Computing

Quasar 438B

Quasar 438B is a reasoning model from Multiverse Computing in the Quasar family. It has 7 scored results in 4 categories. It has no index.

  • Closed weights
  • Reasoning
  • Input: text
  • Released 2026-09
UnrankedEnough results for an index.
IndexAll categories, out of 100.UnrankedMedian 51.0
CoverageIndex weight that has results.70%
SpeedOutput tokens per second.180/sMedian 67/s
First tokenSeconds to the first output token.12.4 sMedian 1.3 s
Input / 1MUS dollars per 1M input tokens.$0.60Median $0.60
Output / 1MUS dollars per 1M output tokens.$1.80Median $2.55
ContextMaximum tokens in one request.1MMedian 262K
EloLMArena rating and rank.—Median 1422

Capabilities

Index per category, out of 100.
Out of 100
AgenticMulti-step tasks with tools.2 counted60.0—
CodingCode writing and repair.1 counted58.5—
ReasoningLogic problems and puzzles.2 counted57.3—
MultimodalTasks with images and text.None counted——
KnowledgeFacts and expert knowledge.2 counted43.7—
MultilingualTasks in many languages.None counted——
InstructionTasks with strict prompt rules.None counted——
MathMath problems.None counted——

Results

7 counted
BenchmarkThe benchmark name.ResultThe score from the source.PlacePlace among results on this benchmark.
Critical Physics TasksReasoning9.4%68 / 214
Artificial Analysis Long Context ReasoningReasoning76.3%86 / 217
GDPval-AA normalizedAgentic34.1%53 / 133
Artificial Analysis SciCodeCoding48.1%59 / 114
Artificial Analysis Humanity's Last ExamKnowledge18.7%119 / 222
Terminal-Bench 2.1 · BenchLMAgentic69.3%52 / 86
Artificial Analysis GPQA DiamondKnowledge73.2%127 / 199

Sources

BenchLMCC BY-NC 4.0

History

5 releases
Output / 1M$1.80 → $1.80
23 Oct 202612 Nov 2026

Questions

How much does Quasar 438B cost?
$0.60 per 1M input tokens, $1.80 per 1M output tokens.
How fast is Quasar 438B?
180 output tokens per second, 12.4 s to the first token.
What is the context window of Quasar 438B?
1M tokens.
Is Quasar 438B open source?
No. Its weights are not published.
When was Quasar 438B released?
September 2026.