Claude Mythos Preview
According to BenchLM.ai, Claude Mythos Preview ranks #1 out of 109 models on the provisional leaderboard with an overall score of 99/100. It also ranks #1 out of 13 on the verified leaderboard. This places it among the top tier of AI models available in 2026, competing directly with the strongest models from all major AI labs.
Claude Mythos Preview is a proprietary model with a 1M token context window. It uses explicit chain-of-thought reasoning, which typically improves performance on math and complex reasoning tasks at the cost of higher latency and token usage.
This profile currently has 14 of 152 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
Its strongest category is Agentic (#1), while its weakest is Instruction Following (#14). This performance profile makes it particularly useful for coding agents, browser research, and computer-use workflows.
Ranking Distribution
Category rank across 6 benchmark categories — sorted by best rank
Category Performance
Scores across all benchmark categories (0-100 scale)
Category Breakdown
Agentic
#1Coding
#1Reasoning
Knowledge
Math
Multilingual
#1Multimodal
#3Inst. Following
#14Benchmark Details
Only benchmark rows with an attached exact-source record are shown here. Source-unverified manual rows and generated rows are hidden from model pages.
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See how Claude Mythos Preview stacks up against similar models
Frequently Asked Questions
How does Claude Mythos Preview perform overall in AI benchmarks?
Claude Mythos Preview currently ranks #1 out of 109 models on BenchLM's provisional leaderboard with an overall score of 99. It also ranks #1 out of 13 on the verified leaderboard. It is created by Anthropic and features a 1M context window.
Is Claude Mythos Preview good for knowledge and understanding?
Claude Mythos Preview has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is Claude Mythos Preview good for coding and programming?
Claude Mythos Preview ranks #1 out of 109 models in coding and programming benchmarks with an average score of 100. It is among the top performers in this category.
Is Claude Mythos Preview good for mathematics?
Claude Mythos Preview has visible benchmark coverage in mathematics, but BenchLM does not currently assign it a global category rank there.
Is Claude Mythos Preview good for agentic tool use and computer tasks?
Claude Mythos Preview ranks #1 out of 109 models in agentic tool use and computer tasks benchmarks with an average score of 100. It is among the top performers in this category.
Is Claude Mythos Preview good for multimodal and grounded tasks?
Claude Mythos Preview ranks #3 out of 109 models in multimodal and grounded tasks benchmarks with an average score of 97.8. It is among the top performers in this category.
Is Claude Mythos Preview good for multilingual tasks?
Claude Mythos Preview ranks #1 out of 109 models in multilingual tasks benchmarks with an average score of 100. It is among the top performers in this category.
Does Claude Mythos Preview have full benchmark coverage on BenchLM?
Not yet. Claude Mythos Preview currently has 14 published benchmark scores out of the 152 benchmarks BenchLM tracks. BenchLM only exposes non-generated public benchmark rows, so missing categories stay blank until a sourced evaluation is available.
What is the context window size of Claude Mythos Preview?
Claude Mythos Preview has a context window of 1M, which determines how much text it can process in a single interaction.
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