Model comparison

Claude Mythos 5 vs Qwen3.8 Max

Updated August 3, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.

Claude Mythos 5

Anthropic

83.0/100

Supported · Public rank #1

90% interval 79.3–86.7

Qwen3.8 Max

Alibaba

65.4/100

Estimated · Public rank #31

90% interval 55.5–75.3

Claude Mythos 5 has the higher public score, 82.98 versus 65.4, and the 90% score intervals do not overlap.

7 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.

Which one for your work

Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.

No workload recommendation clears the current evidence threshold.

Use the matched evidence, workload costs, and sourced specifications below instead of treating a point score as a universal answer.

Show secondary and unsupported calls

Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.
Confidence: limited
Long documents
Prompts that approach the documented context limit
No clear pick
The documented context windows are equal.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates

What is actually comparable

Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.

8 Claude Mythos 5 only

7 Shared

45 Qwen3.8 Max only

Shared results: 7
Claude Mythos 5 only: 8
Qwen3.8 Max only: 45
Like-for-like categories: 1 / 8

3 categories use different evidence sets. Those rows remain visible for coverage context but do not name a winner.

Category results, on a stated basis

Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.

Knowledge

Like-for-like

Claude Mythos 5: 68.5
Qwen3.8 Max: 50.2
Weighted basis: 2 vs 2 rows
Reading: Claude Mythos 5 leads

Agentic

Directional only

Claude Mythos 5: 87.0
Qwen3.8 Max: 86.1
Weighted basis: 3 vs 1 rows
Reading: Directional only

Coding

Directional only

Claude Mythos 5: 89.7
Qwen3.8 Max: 67.7
Weighted basis: 2 vs 1 rows
Reading: Directional only

Multimodal

Directional only

Claude Mythos 5: 93.5
Qwen3.8 Max: 86.3
Weighted basis: 1 vs 2 rows
Reading: Directional only

Reasoning

Not comparable

Claude Mythos 5: Not measured
Qwen3.8 Max: 78.3
Weighted basis: 0 vs 2 rows
Reading: Not comparable

Math

Not comparable

Claude Mythos 5: 97.6
Qwen3.8 Max: Not measured
Weighted basis: 1 vs 0 rows
Reading: Not comparable

Multilingual

Not comparable

Claude Mythos 5: Not measured
Qwen3.8 Max: Not measured
Weighted basis: 0 vs 0 rows
Reading: Not comparable

Instruction following

Not comparable

Claude Mythos 5: Not measured
Qwen3.8 Max: 82.8
Weighted basis: 0 vs 1 rows
Reading: Not comparable

Category averages with the server-provided evidence basis for Claude Mythos 5 and Qwen3.8 Max
Category	Claude Mythos 5	Qwen3.8 Max	Weighted basis	Reading
Knowledge	68.5	50.2	Like-for-like2 vs 2 rows	Claude Mythos 5 leads
Agentic	87.0	86.1	Directional only3 vs 1 rows	Directional only
Coding	89.7	67.7	Directional only2 vs 1 rows	Directional only
Multimodal	93.5	86.3	Directional only1 vs 2 rows	Directional only
Reasoning	Not measured	78.3	Not comparable0 vs 2 rows	Not comparable
Math	97.6	Not measured	Not comparable1 vs 0 rows	Not comparable
Multilingual	Not measured	Not measured	Not comparable0 vs 0 rows	Not comparable
Instruction following	Not measured	82.8	Not comparable0 vs 1 rows	Not comparable

Shape of the matched evidence

Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.

Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.

HLE
Knowledge
Claude Mythos 5: 64.5%Qwen3.8 Max: 43.6%Normalized gap 20.9Claude Mythos 5 source Qwen3.8 Max source
SWE-bench Pro
Coding
Claude Mythos 5: 80.3%Qwen3.8 Max: 67.7%Normalized gap 12.6Claude Mythos 5 source Qwen3.8 Max source
GPQA
Knowledge
Claude Mythos 5: 94.1%Qwen3.8 Max: 92.6%Normalized gap 1.5Claude Mythos 5 source Qwen3.8 Max source
OSWorld-Verified
Agentic
Claude Mythos 5: 85%Qwen3.8 Max: 86.1%Normalized gap 1.1Claude Mythos 5 source Qwen3.8 Max source

What each workload costs

Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.

Chat turn

1K fresh input + 500 output tokens

Claude Mythos 5: $0.035; Fits in one request
Qwen3.8 Max: API rate not published; Fits in one request

Qwen3.8 Max has no comparable published API token rate.

Repository review

50K fresh input + 3K output tokens

Claude Mythos 5: $0.65; Fits in one request
Qwen3.8 Max: API rate not published; Fits in one request

Qwen3.8 Max has no comparable published API token rate.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

Claude Mythos 5: $0.9; Fits in one request
Qwen3.8 Max: API rate not published; Fits in one request; Cached-input rate unavailable

Qwen3.8 Max has no comparable published API token rate.

Specification differences

Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.

SpecificationClaude Mythos 5Qwen3.8 Max

Context window

Maximum documented context; output-token limits may be lower.

Claude Mythos 5

Anthropic model overview

Qwen3.8 Max

Alibaba Cloud Model Studio pricing

API model ID

Claude Mythos 5

claude-mythos-5

Anthropic model overview

Qwen3.8 Max

qwen3.8-max

Alibaba Cloud Model Studio pricing

Cached-input rate

A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.

Claude Mythos 5

$1 per 1M cached input tokens

Claude API pricing

Qwen3.8 Max

No comparable hosted API rate

Alibaba Cloud Model Studio pricing

Documented inputs

Claude Mythos 5

text, image

Anthropic model overview

Qwen3.8 Max

Not sourced

Documented outputs

Claude Mythos 5

text

Anthropic model overview

Qwen3.8 Max

Not sourced

Provider availability

Claude Mythos 5

Limited Access · Claude API

Anthropic model overview

Qwen3.8 Max

Not sourced

Reasoning profile

Claude Mythos 5

Reasoning

Qwen3.8 Max

Reasoning

Weight access

Claude Mythos 5

Proprietary

Qwen3.8 Max

Proprietary

License

Claude Mythos 5

Proprietary

Qwen3.8 Max

Proprietary

Release date

Claude Mythos 5

2026-06-09

Qwen3.8 Max

2026-08-03

If you already use one of these models

Deployment change: The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
Quality signal: Claude Mythos 5 has the higher public score, 82.98 versus 65.4, and the 90% score intervals do not overlap.
Workload cost: A complete comparable API-rate estimate is not available for both models.
Context tradeoff: Both models list 1M.

Run the same representative tasks against both endpoints before changing production traffic.

Benchmark evidence

The full public result ledger is available for audit without forcing a wide desktop table onto a phone.

Browse raw public benchmark evidence60 rows

Agentic

Terminal-Bench 2.0
Claude Mythos 588%
Source
Qwen3.8 Max—
Not directly comparable
OSWorld-Verified
Claude Mythos 585%
Source
Qwen3.8 Max86.1%
Source
Qwen3.8 Max leads this result
BrowseComp
Claude Mythos 588%
Source
Qwen3.8 Max—
Not directly comparable
ExploitGym
Claude Mythos 517.5%
Source
Qwen3.8 Max—
Not directly comparable
Terminal-Bench 2.1
Claude Mythos 5—
Qwen3.8 Max86.6%
Source
Not directly comparable
CoWorkBench
Claude Mythos 5—
Qwen3.8 Max74.8%
Source
Not directly comparable
JobBench
Claude Mythos 5—
Qwen3.8 Max53.4%
Source
Not directly comparable
skillsBench
Claude Mythos 5—
Qwen3.8 Max70.2%
Source
Not directly comparable
Agents' Last Exam
Claude Mythos 5—
Qwen3.8 Max52.4%
Source
Not directly comparable
AutomationBench
Claude Mythos 5—
Qwen3.8 Max27.3%
Source
Not directly comparable
Toolathlon-Verified
Claude Mythos 5—
Qwen3.8 Max72.5%
Source
Not directly comparable
WideResearch
Claude Mythos 5—
Qwen3.8 Max81.9%
Source
Not directly comparable
HLE w/ tools
Claude Mythos 5—
Qwen3.8 Max56.2%
Source
Not directly comparable
OSWorld 2.0
Claude Mythos 5—
Qwen3.8 Max19.4%
Source
Not directly comparable
WebArena-Verified
Claude Mythos 5—
Qwen3.8 Max66.8%
Source
Not directly comparable
AndroidWorld
Claude Mythos 5—
Qwen3.8 Max85.3%
Source
Not directly comparable
MobileWorld
Claude Mythos 5—
Qwen3.8 Max77.8%
Source
Not directly comparable

Coding

SWE-bench Verified
Claude Mythos 595.5%
Source
Qwen3.8 Max—
Not directly comparable
SWE-bench Pro
Claude Mythos 580.3%
Source
Qwen3.8 Max67.7%
Source
Claude Mythos 5 leads this result
Terminal-Bench 2.0
Claude Mythos 588.0%
Source
Qwen3.8 Max—
Not directly comparable
Terminal-Bench 2.1
Claude Mythos 5—
Qwen3.8 Max86.6%
Source
Not directly comparable
deepSwe
Claude Mythos 5—
Qwen3.8 Max56.6%
Source
Not directly comparable
NL2Repo
Claude Mythos 5—
Qwen3.8 Max55.9%
Source
Not directly comparable
FrontierSWE
Claude Mythos 5—
Qwen3.8 Max73.5%
Source
Not directly comparable
MLS-Bench Lite
Claude Mythos 5—
Qwen3.8 Max41.0%
Source
Not directly comparable
PaperBench
Claude Mythos 5—
Qwen3.8 Max93.0%
Source
Not directly comparable

Reasoning

MRCRv2
Claude Mythos 5—
Qwen3.8 Max92.9%
Source
Not directly comparable
LongBench v2
Claude Mythos 5—
Qwen3.8 Max66.3%
Source
Not directly comparable

Knowledge

GPQA
Claude Mythos 594.1%
Source
Qwen3.8 Max92.6%
Source
Claude Mythos 5 leads this result
HLE
Claude Mythos 564.5%
Source
Qwen3.8 Max43.6%
Source
Claude Mythos 5 leads this result
HLE w/o tools
Claude Mythos 559%
Source
Qwen3.8 Max43.6%
Source
Claude Mythos 5 leads this result
GPQA-D
Claude Mythos 5—
Qwen3.8 Max92.6%
Source
Not directly comparable

Math

USAMO 2026
Claude Mythos 597.6%
Source
Qwen3.8 Max—
Not directly comparable

Multilingual

SWE Multilingual
Claude Mythos 592.2%
Source
Qwen3.8 Max—
Not directly comparable

Multimodal

SWE-bench Multimodal
Claude Mythos 554.9%
Source
Qwen3.8 Max—
Not directly comparable
CharXiv
Claude Mythos 593.5%
Source
Qwen3.8 Max93.5%
Source
Tie
CharXiv w/o tools
Claude Mythos 588.9%
Source
Qwen3.8 Max88.4%
Source
Claude Mythos 5 leads this result
MMMU-Pro
Claude Mythos 5—
Qwen3.8 Max82.3%
Source
Not directly comparable
MathVision
Claude Mythos 5—
Qwen3.8 Max95.2%
Source
Not directly comparable
MathVision w/ Python
Claude Mythos 5—
Qwen3.8 Max97.7%
Source
Not directly comparable
BabyVision
Claude Mythos 5—
Qwen3.8 Max82.0%
Source
Not directly comparable
BabyVision w/ Python
Claude Mythos 5—
Qwen3.8 Max91.3%
Source
Not directly comparable
ZeroBench
Claude Mythos 5—
Qwen3.8 Max24.0%
Source
Not directly comparable
ZeroBench w/ Python
Claude Mythos 5—
Qwen3.8 Max49.0%
Source
Not directly comparable
MedXpertQA (MM)
Claude Mythos 5—
Qwen3.8 Max80.4%
Source
Not directly comparable
ScreenSpot Pro
Claude Mythos 5—
Qwen3.8 Max84.5%
Source
Not directly comparable
Vision2Web
Claude Mythos 5—
Qwen3.8 Max69.0%
Source
Not directly comparable
OmniDocBench 1.5
Claude Mythos 5—
Qwen3.8 Max92.1%
Source
Not directly comparable
OCRBench V2
Claude Mythos 5—
Qwen3.8 Max74.2%
Source
Not directly comparable
CC-OCR
Claude Mythos 5—
Qwen3.8 Max79.6%
Source
Not directly comparable
RealWorldQA
Claude Mythos 5—
Qwen3.8 Max88.0%
Source
Not directly comparable
ERQA
Claude Mythos 5—
Qwen3.8 Max77.8%
Source
Not directly comparable
SimpleVQA
Claude Mythos 5—
Qwen3.8 Max75.0%
Source
Not directly comparable
PerceptionBench
Claude Mythos 5—
Qwen3.8 Max63.5%
Source
Not directly comparable
Video-MME (with subtitle)
Claude Mythos 5—
Qwen3.8 Max90.4%
Source
Not directly comparable
VideoMMMU
Claude Mythos 5—
Qwen3.8 Max88.7%
Source
Not directly comparable
MMVU
Claude Mythos 5—
Qwen3.8 Max82.4%
Source
Not directly comparable
MLVU (M-Avg)
Claude Mythos 5—
Qwen3.8 Max90.8%
Source
Not directly comparable
LVBench
Claude Mythos 5—
Qwen3.8 Max81.8%
Source
Not directly comparable

Instruction following

IFBench
Claude Mythos 5—
Qwen3.8 Max82.8%
Source
Not directly comparable

Frequently asked questions

Which is better, Claude Mythos 5 or Qwen3.8 Max?

Claude Mythos 5 has the higher public score, 82.98 versus 65.4, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.

Which is better for coding, Claude Mythos 5 or Qwen3.8 Max?

The current coding averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.

Which is better for agentic tasks, Claude Mythos 5 or Qwen3.8 Max?

The current agentic tasks averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.

Which costs less, Claude Mythos 5 or Qwen3.8 Max?

Both models do not have comparable published API token rates, so this page does not name a universal price winner.

Which has the larger context window, Claude Mythos 5 or Qwen3.8 Max?

Both models list the same context window, 1M.

Related comparisons

Compare API pricing Read the methodology Open the model selector

Last updated August 3, 2026

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Claude Mythos 5 vs Qwen3.8 Max

Which one for your work

Coding work

Agentic work

Long documents

Chat turn cost

Cache-heavy agent loop cost

Repository review cost

What is actually comparable

Category results, on a stated basis

Knowledge

Agentic

Coding

Multimodal

Reasoning

Math

Multilingual

Instruction following

Shape of the matched evidence

What each workload costs

Chat turn

Repository review

Cache-heavy agent loop

Specification differences

Context window

API model ID

Cached-input rate

Documented inputs

Documented outputs

Provider availability

Reasoning profile

Weight access

License

Release date

Benchmark evidence

Agentic

Coding

Reasoning

Knowledge

Math

Multilingual

Multimodal

Instruction following

Frequently asked questions

Which is better, Claude Mythos 5 or Qwen3.8 Max?

Which is better for coding, Claude Mythos 5 or Qwen3.8 Max?

Which is better for agentic tasks, Claude Mythos 5 or Qwen3.8 Max?

Which costs less, Claude Mythos 5 or Qwen3.8 Max?

Which has the larger context window, Claude Mythos 5 or Qwen3.8 Max?

Related comparisons

Watch Claude Mythos 5 vs Qwen3.8 Max