Data points: 115
Model compare
The readout for Claude Haiku 4.5 and GPT-5.1, before the detailed comparison sheet.
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1
GPT-5.1 has the higher weighted result; Model A / B score 16 to 84.
Evidence depth
115 data points
Includes 23 benchmark rows, 1 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 30 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for Claude Haiku 4.5 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Haiku 4.5 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 16.0 pts | 84.0 pts |
| Benchmark category leads | 0 categories | 8 categories |
| Operational advantages | Cheapest input price, First-token latency, Free providers, Provider coverage | Average speed |
| Context window | 200K tokens | 400K tokens |
| Max output | 64K tokens | 128K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | Claude Haiku 4.5 | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | Oct 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-haiku-4.5 | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Haiku 4.5 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Haiku 4.5
Claude Haiku 4.5 has these operational advantages: Cheapest input price, First-token latency, Free providers, Provider coverage.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Average speed).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
Claude Haiku 4.5
49.6
Avg. score
GPT-5.1
55.5
GPT-5.1 leads by 4.2
GPT-5.1 leads by 4.8
GPT-5.1 leads by 4.9
GPT-5.1 leads by 10.9
GPT-5.1 leads by 8.3
GPT-5.1 leads by 4.8
GPT-5.1 leads by 8.9
GPT-5.1 leads by 1.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Haiku 4.5
53.0
Rank #66/127 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner72.0
Rank #27/127 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
winner0.80 s
Rank #28/139 · confidence 4
GPT-5.1
30.09 s
Rank #103/139 · confidence 4
Claude Haiku 4.5
winner0.80 s
Rank #40/139 · confidence 4
GPT-5.1
30.09 s
Rank #127/139 · confidence 4
Claude Haiku 4.5
97.3 tok/s
Rank #65/139 · confidence 4
GPT-5.1
winner109.7 tok/s
Rank #55/139 · confidence 4
Claude Haiku 4.5
winner$1.00/M
Rank #100/163 · confidence 4
GPT-5.1
$1.25/M
Rank #109/163 · confidence 4
Claude Haiku 4.5
winner$2.00/M
Rank #103/163 · confidence 4
GPT-5.1
$3.44/M
Rank #119/163 · confidence 4
Claude Haiku 4.5
winner$5.00/M
Rank #106/163 · confidence 4
GPT-5.1
$10.00/M
Rank #122/163 · confidence 4
Claude Haiku 4.5
80.0%
Rank #61/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Claude Haiku 4.5
55.7
Rank #33/70 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner65.4
Rank #23/70 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
64.6%
Rank #130/187 · confidence 4
GPT-5.1
winner87.3%
Rank #32/187 · confidence 4
Claude Haiku 4.5
4.3%
Rank #149/186 · confidence 4
GPT-5.1
winner26.5%
Rank #39/186 · confidence 4
Claude Haiku 4.5
51.1%
Rank #59/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Claude Haiku 4.5
34.4%
Rank #114/184 · confidence 4
GPT-5.1
winner43.3%
Rank #41/184 · confidence 4
Claude Haiku 4.5
52.9
Rank #66/100 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner64.9
Rank #52/100 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
2.1
Rank #32/35 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner12.5
Rank #16/35 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
5.9
Rank #36/47 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
29.5
Rank #46/59 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner47.5
Rank #35/59 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
46.8
Rank #69/92 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner76.9
Rank #22/92 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
61.6
Rank #32/62 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner84.0
Rank #8/62 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
72.0
Rank #22/81 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner91.9
Rank #1/81 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
1156.0
Rank #51/65 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner1222.0
Rank #37/65 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
69.7
Rank #39/75 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner72.5
Rank #35/75 · confidence 1 · eval date 2025-11-13
Claude Haiku 4.5
42.9
Rank #63/95 · confidence 1 · eval date 2025-10-15
GPT-5.1
winner70.5
Rank #29/95 · confidence 1 · eval date 2025-11-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Haiku 4.5 | GPT-5.1 |
|---|---|---|
Winner: Claude Haiku 4.5 | Claude Haiku 4.5 claude-haiku-4.5 Audit score 84 648410088 | GPT-5.1 gpt-5.1 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Haiku 4.5 | GPT-5.1 |
|---|---|---|
20 tests | Claude Haiku 4.5 speed / latency 112 tok/s / 1733ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
10 tests | Claude Haiku 4.5 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data |
10 tests | Claude Haiku 4.5 speed / latency 68 tok/s / 4647ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Claude Haiku 4.5 speed / latency 21 tok/s / 1170ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Claude Haiku 4.5 speed / latency 109 tok/s / 2221ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency No data input / output $0.800/M/$4.00/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
