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Claude Opus 4.8 vs SWE-2 Flash

Claude Opus 4.8 and SWE-2 Flash are closely matched at 49.1 and 43.8 on the LLM Stats Score.

Anthropic · Cognition · Updated for 2026

Which is better?

Claude Opus 4.8 and SWE-2 Flash are closely matched on the overall LLM Stats Score at 49.1 and 43.8.

In the 3 individual benchmarks reported for both models, Claude Opus 4.8 wins 2; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 4.8

  • you value its reported benchmark strengths — it wins 2 of 3 exact shared results

Choose SWE-2 Flash

  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Claude Opus 4.8
Anthropic
SWE-2 Flash
Cognition
Core performance indexes
LLM Stats Score
49.1
#26
43.8
#58
Reasoning
49.2
#19
42.6
#61
Coding
37.6
#22
33.0
#44
Agents
32.5
#42
30.1
#50
Cost, coverage & limits
Benchmark wins
2 of 3
1 of 3
Input price
$5.00 / M
— / M
Output price
$25.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 4.8
SWE-2 Flash
Tool use
27.7#33
23.0#58
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

28 reported for Claude Opus 4.8 · 7 for SWE-2 Flash

3 shared

Claude Opus 4.8 outperforms in 2 benchmarks (FrontierCode 1.1, Terminal-Bench 4.0), while SWE-2 Flash is better at 1 benchmark (DeepSWE 1.1).

Claude Opus 4.8 shows notably better performance in the majority of benchmarks.

Thu Nov 12 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Opus 4.8 specifies input context (1,000,000 tokens). Only Claude Opus 4.8 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.8
Input1,000,000 tokens
Output128,000 tokens
Cognition
SWE-2 Flash
Input- tokens
Output- tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 4.8 supports multimodal inputs, whereas SWE-2 Flash does not.

Claude Opus 4.8 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.8

Text
Images
Audio
Video

SWE-2 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4.8

Proprietary

Closed source

SWE-2 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.8 was released on 2026-05-28, while SWE-2 Flash was released on 2026-11-04.

SWE-2 Flash is 5 months newer than Claude Opus 4.8.

Claude Opus 4.8

May 28, 2026

5 months ago

SWE-2 Flash

Nov 4, 2026

1 weeks ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 4.8 and SWE-2 Flash side-by-side, then vote on the output you prefer.

Claude Opus 4.8
✓ Preferred
SWE-2 Flash
Open in Playground

FAQ

Common questions about Claude Opus 4.8 vs SWE-2 Flash.

Which is better, Claude Opus 4.8 or SWE-2 Flash?

Claude Opus 4.8 and SWE-2 Flash are closely matched on the LLM Stats Score at 49.1 and 43.8. Claude Opus 4.8 is made by Anthropic and SWE-2 Flash is made by Cognition. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 4.8 compare to SWE-2 Flash in benchmarks?

Claude Opus 4.8 scores GPQA: 93.6%, DeepSearchQA: 93.1%, CharXiv-R: 89.9%, SWE-Bench Verified: 88.6%, ScreenSpot Pro: 87.9%. SWE-2 Flash scores Terminal-Bench 2.1: 89.2%, DeepSWE 1.1: 60.1%, SWE Atlas - Codebase QnA: 50.0%, FrontierCode 1.1: 45.5%, ExploitBench: 34.8%.

What are the context window sizes for Claude Opus 4.8 and SWE-2 Flash?

Claude Opus 4.8 supports 1.0M tokens and SWE-2 Flash supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.8 and SWE-2 Flash?

Key differences include LLM Stats Score (49.1 vs 43.8), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.8 and SWE-2 Flash?

Claude Opus 4.8 is developed by Anthropic and SWE-2 Flash is developed by Cognition.

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