Data points: 94
Model compare
The readout for Claude Opus 4.8 and GPT-3.5 Turbo, before the detailed comparison sheet.
Weighted outcome: Claude Opus 4.8. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Opus 4.8
Claude Opus 4.8 has the higher weighted result; Model A / B score 92 to 8.
Evidence depth
94 data points
Includes 7 benchmark rows, 3 audit samples, and 8 provider examples.
Selection signal
Start with Claude Opus 4.8
The charts below split 18 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 Opus 4.8 and GPT-3.5 Turbo: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.8 | GPT-3.5 Turbo |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 92.0 pts | 8.0 pts |
| Benchmark category leads | 3 categories | 0 categories |
| Operational advantages | Cheapest input price, Average speed, Provider coverage | First-token latency, Free providers |
| Context window | 1M tokens | 16.4K tokens |
| Max output | 128K tokens | 4.1K 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 Opus 4.8 | GPT-3.5 Turbo |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | May 2026 | Jan 2024 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | 2021-09-30 |
| OpenRouter ID | anthropic/claude-opus-4.8 | openai/gpt-3.5-turbo |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.8 and GPT-3.5 Turbo: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.8
Claude Opus 4.8 is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (Cheapest input price, Average speed, Provider coverage).
GPT-3.5 Turbo
GPT-3.5 Turbo has these operational advantages: First-token latency, Free providers.
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 Opus 4.8
60.8
Avg. score
GPT-3.5 Turbo
40
Claude Opus 4.8
Claude Opus 4.8 leads by 17.6
Claude Opus 4.8 leads by 26.6
Claude Opus 4.8
Claude Opus 4.8 leads by 20.7
Claude Opus 4.8
Claude Opus 4.8
Claude Opus 4.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.8
23.67 s
Rank #96/139 · confidence 4
GPT-3.5 Turbo
winner0.70 s
Rank #24/139 · confidence 4
Claude Opus 4.8
23.67 s
Rank #126/139 · confidence 4
GPT-3.5 Turbo
winner0.70 s
Rank #33/139 · confidence 4
Claude Opus 4.8
57.4 tok/s
Rank #102/139 · confidence 4
GPT-3.5 Turbo
winner135.0 tok/s
Rank #38/139 · confidence 4
Claude Opus 4.8
$25.00/M
Rank #148/163 · confidence 4
GPT-3.5 Turbo
winner$1.50/M
Rank #54/163 · confidence 4
Claude Opus 4.8
$10.00/M
Rank #148/163 · confidence 4
GPT-3.5 Turbo
winner$0.750/M
Rank #60/163 · confidence 4
Claude Opus 4.8
$5.00/M
Rank #147/163 · confidence 4
GPT-3.5 Turbo
winner$0.500/M
Rank #70/163 · confidence 4
Claude Opus 4.8
winner92.0%
Rank #10/187 · confidence 4
GPT-3.5 Turbo
29.7%
Rank #186/187 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.8 | GPT-3.5 Turbo |
|---|---|---|
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 100 100100100100 | GPT-3.5 Turbo gpt-3.5-turbo No audit yet |
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 91 7610086100 | GPT-3.5 Turbo gpt-3.5-turbo No audit yet |
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 83 668480100 | GPT-3.5 Turbo gpt-3.5-turbo No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.8 | GPT-3.5 Turbo |
|---|---|---|
5 tests | Claude Opus 4.8 speed / latency 50 tok/s / 4823ms input / output No data | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-3.5 Turbo speed / latency 54 tok/s / 9591ms input / output No data |
0 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data |
0 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data |
0 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0/request | GPT-3.5 Turbo gpt-3.5-turbo-16k-0613 speed / latency No data input / output $0/request | |
Claude Opus 4.8 claude-opus-4-8-c speed / latency No data input / output $0.0082/request | GPT-3.5 Turbo gpt-3.5-turbo-16k speed / latency No data input / output $2.79/M | |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0.021/request | GPT-3.5 Turbo gpt-3.5-turbo-16k-0613 speed / latency No data input / output $3.08/M |
Weighted outcome: Claude Opus 4.8. 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 inputText outputTool callingStructured outputsJSON mode |
|---|
