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Claude 3.5 Haiku vs SWE-2 Flash

SWE-2 Flash leads the LLM Stats Score 43.8 to 4.5.

Anthropic · Cognition · Updated for 2026

Which is better?

SWE-2 Flash leads the overall LLM Stats Score 43.8 to 4.5, ranking #59 overall.

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

Choose Claude 3.5 Haiku

  • you want predictable pricing at $0.80/M input and $4.00/M output

Choose SWE-2 Flash

  • overall performance matters — it scores 43.8 and ranks #59 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Claude 3.5 Haiku
Anthropic
SWE-2 Flash
Cognition
Core performance indexes
LLM Stats Score
4.5
#346
43.8
#59
Reasoning
4.6
#341
42.6
#61
Coding
3.6
#256
33.0
#44
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.80 / M
— / M
Output price
$4.00 / M
— / M
Context window
200,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude 3.5 Haiku
SWE-2 Flash
Tool use
-4.8#231
23.0#58
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude 3.5 Haiku · 7 for SWE-2 Flash

No common benchmarks found

Claude 3.5 Haiku and SWE-2 Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude 3.5 Haiku specifies input context (200,000 tokens). Only Claude 3.5 Haiku specifies output context (200,000 tokens).

Anthropic
Claude 3.5 Haiku
Input200,000 tokens
Output200,000 tokens
Cognition
SWE-2 Flash
Input- tokens
Output- tokens
Thu Nov 12 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude 3.5 Haiku

Proprietary

Closed source

SWE-2 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while SWE-2 Flash was released on 2026-11-04.

SWE-2 Flash is 25 months newer than Claude 3.5 Haiku.

Claude 3.5 Haiku

Oct 22, 2024

2.1 years ago

SWE-2 Flash

Nov 4, 2026

1 weeks ago

2.0yr 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 3.5 Haiku and SWE-2 Flash side-by-side, then vote on the output you prefer.

Claude 3.5 Haiku
✓ Preferred
SWE-2 Flash
Open in Playground

FAQ

Common questions about Claude 3.5 Haiku vs SWE-2 Flash.

Which is better, Claude 3.5 Haiku or SWE-2 Flash?

SWE-2 Flash leads the LLM Stats Score 43.8 to 4.5. Claude 3.5 Haiku 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 3.5 Haiku compare to SWE-2 Flash in benchmarks?

Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%. 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 3.5 Haiku and SWE-2 Flash?

Claude 3.5 Haiku supports 200K 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 3.5 Haiku and SWE-2 Flash?

Key differences include LLM Stats Score (4.5 vs 43.8). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Haiku and SWE-2 Flash?

Claude 3.5 Haiku is developed by Anthropic and SWE-2 Flash is developed by Cognition.

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