# classifier.dev (fast) vs Claude 4.1 Opus Thinking

> Side-by-side benchmark comparison for classifier.dev (fast) and Claude 4.1 Opus Thinking across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/classifier-dev-fast-vs-claude-4-1-opus-thinking
- Last updated: October 1, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for classifier.dev (fast) and Claude 4.1 Opus Thinking.

## Summary

- classifier.dev (fast) and Claude 4.1 Opus Thinking do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | classifier.dev (fast) | Claude 4.1 Opus Thinking |
|----------|----------|----------|
| Creator | classifier.dev | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | null | 200K |
| Independent public score (not head-to-head) | null | 40.46 |
| Benchmarks Covered | 2 | 0 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Reasoning

- Winner: Insufficient shared evidence
- classifier.dev (fast) public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 74.6 (Unranked · 2 rankable rows)

| Benchmark | classifier.dev (fast) | Claude 4.1 Opus Thinking | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 70.82 | Coming soon | Coming soon |
| JevBench 1.5 | 74.66 | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- classifier.dev (fast) public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 61.1 (Unranked · 1 rankable row)

### Knowledge

- Winner: Insufficient shared evidence
- classifier.dev (fast) public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 42.9 (Estimated · #90/170)

### Instruction Following

- Winner: Insufficient shared evidence
- classifier.dev (fast) public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 65.1 (#69/124)

## FAQ

### Can I compare classifier.dev (fast) and Claude 4.1 Opus Thinking on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [classifier.dev (fast) vs Claude 4.1 Opus](/compare/classifier-dev-fast-vs-claude-4-1-opus)
- [Claude 4.1 Opus Thinking vs Claude 4.1 Opus](/compare/claude-4-1-opus-vs-claude-4-1-opus-thinking)
- [classifier.dev (fast) vs GPT-6 Astra](/compare/classifier-dev-fast-vs-gpt-6-astra)
- [Claude 4.1 Opus Thinking vs GPT-6 Astra](/compare/claude-4-1-opus-thinking-vs-gpt-6-astra)

## Explore More

- [classifier.dev (fast) profile](/models/classifier-dev-fast)
- [Claude 4.1 Opus Thinking profile](/models/claude-4-1-opus-thinking)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)