Clover 35B A3B Preview vs Claude Haiku 5.5, head to head

Side A

Side B

Overall

Claude Haiku 5.5 is clearly better. It wins 77 of the 82 test cases where they differ.

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Task by task

A score turns orange only when that model wins clearly more of the task's test cases. The time under each score is the average per test case, on the machine it ran on. Clover 35B A3B Preview spends 2.6× as many thinking tokens per test case.

Thinking tokensAnswer tokens

TaskAClover 35B A3B PreviewBClaude Haiku 5.5Clover 35B A3B PreviewClaude Haiku 5.5

Overall

3035.1s

8.4K3.9K

7025.5s

Agents

Runs multi-step jobs through tools, within a written policy

2036.8s

9.6K3.7K

6139.5s

Structured Extraction

Turns logs, diffs and records into exact JSON

4327.5s

7.2K2.6K

9013.5s

Coding

Writes code and SQL that pass hidden tests

101m 5s

12.2K6.8K

8630.6s

Grounded Answers

Answers from the given documents with sources, never guesses

4821.0s

5.4K2.2K

7613.9s

Instruction Following

Applies every rule, including ones changed mid-conversation

5332.8s

9.2K4.3K

9431.5s

Business Logic

Computes billing, scheduling and pricing rules exactly

1936.1s

9.8K5.5K

6726.0s

Security & permissions

Ignores planted instructions, still does the allowed work

4725.6s

5.8K2.7K

6723.4s

Diagnosis & investigation

Chooses diagnostic checks, repairs supported causes and verifies recovery

037.0s

7K2.3K

1725.5s

What you'd run

The build behind each score. Orange marks the faster, smaller, cheaper or longer-context side.

SpecAClover 35B A3B PreviewBClaude Haiku 5.5

Speed

252 tok/s

225 tok/s

Machine

Hosted

Memory at 32K

—

Context

—

Cost per run

Not measured

$0.42

Cost per case

Not measured

$0.0028

Time per case

35.1s

25.5s

Quantization

—

Harness

custom

openrouter

The race

No lead changes

Each model's running score as the test cases go by. The dashed line is a perfect run.

Clover 35B A3B PreviewClaude Haiku 5.5

Every test case

153 test cases

Each square is one test case, colored by the model that scored higher.

Agents112

Structured Extraction111

Coding016

Grounded Answers17

Instruction Following012

Business Logic111

Security & permissions17

Diagnosis & investigation01

5 won by Clover 35B A3B Preview77 won by Claude Haiku 5.571 tied