Which is better for coding — Claude Opus 4.5 or LongCat-Flash-Chat?

Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.

Which model is cheaper — Claude Opus 4.5 or LongCat-Flash-Chat?

API pricing data is available on the individual model pages.

Which has a larger context window — Claude Opus 4.5 or LongCat-Flash-Chat?

Context window data is available on the individual model pages.

Claude Opus 4.5 vs LongCat-Flash-Chat: Specs & Benchmark Comparison

Characteristic	Claude Opus 4.5	LongCat-Flash-Chat
Company	Anthropic	Meituan
Release Date	November 23, 2025	August 28, 2025
Parameters	—	560B
Multimodal	Yes	No
Context (input)	200K	—
Context (output)	64K	—
Input Price / 1M	$5.00	—
Output Price / 1M	$25.00	—
Average Score	0.9	0.9
Benchmarks
GPQA	0.9	0.7

Visual Benchmark Comparison

Claude Opus 4.5

LongCat-Flash-Chat

GPQA0.9 vs 0.7

0.9

0.7

Verdict

Claude Opus 4.5 leads in 1 out of 2 comparison categories.

Overall Performance

Both models show comparable average scores: Claude Opus 4.5 — 0.9, LongCat-Flash-Chat — 0.9.

Recency

Claude Opus 4.5 is newer: released 11/23/2025 vs 8/28/2025.

More About These Models

Claude Opus 4.5

Anthropic — specs, benchmarks, API

LongCat-Flash-Chat

Meituan — specs, benchmarks, API

Related Comparisons

Claude Opus 4.5 vs Claude Opus 4.6 Claude Opus 4.5 vs Claude Sonnet 4.6 Claude Opus 4.5 vs MiniMax M2.1 Claude Opus 4.5 vs Grok-3 Mini Claude Opus 4.5 vs Mistral Large 2 Claude Opus 4.5 vs GPT-5.1 Instant

All model comparisons →

The Claude Opus 4.5 and LongCat-Flash-Chat comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 4.5 or LongCat-Flash-Chat page. See also the complete list of AI model comparisons.