AI BENCHY Compare
OpenAI: GPT-5.4 vs StepFun: Step 3.5 Flash
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Last updated at: 2026-03-05
| Metric | OpenAI: GPT-5.4 medium Release: 2026-03-05 | StepFun: Step 3.5 Flash medium Release: 2026-02-01 Free Available |
|---|---|---|
| Avg Score | 8.2 | 7.5 |
| Tests Correct | ||
| Rank | #7 | #16 |
| Consistency | 8.9 | 9.0 |
| Cost per result | 6.533 | 0.000 |
| Total Cost | $0.784 | $0.000 |
| Attempt pass rate | 86.7% | 73.3% |
| Flaky tests | 2 | 2 |
| common.totalAttempts | 45 (15 x 3) | 45 (15 x 3) |
| Output Tokens | 1,611 | 69,238 |
| Reasoning Tokens | 46,321 | 152,563 |
| Response Time (avg) | 21.06s | 31.60s |
| Response Time (max) | 100.41s | 170.45s |
| Response Time (total) | 315.95s | 284.43s |
Score vs Total Cost
Response Time (avg)
Avg Score vs Response Time (avg)
Category Breakdown
| Anti-AI Tricks | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 10.0 | 10.0 | 100.0% | 0 | 5.02s | 216 | 1,466 | |
| StepFun: Step 3.5 Flash | 10.0 | 10.0 | 100.0% | 0 | 18.54s | 13,924 | 17,208 |
| Combined | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 10.0 | 10.0 | 100.0% | 0 | 20.57s | 301 | 3,543 | |
| StepFun: Step 3.5 Flash | 10.0 | 10.0 | 100.0% | 0 | 29.57s | 1,176 | 12,984 |
| Data parsing and extraction | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 9.9 | 10.0 | 100.0% | 0 | 5.32s | 234 | 804 | |
| StepFun: Step 3.5 Flash | 10.0 | 10.0 | 100.0% | 0 | 15.01s | 600 | 13,886 |
| Domain specific | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 4.0 | 7.2 | 44.4% | 1 | 74.27s | 61 | 34,748 | |
| StepFun: Step 3.5 Flash | 4.0 | 7.2 | 44.4% | 1 | 170.45s | 45,350 | 90,436 |
| Instructions following | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 10.0 | 10.0 | 100.0% | 0 | 3.11s | 93 | 897 | |
| StepFun: Step 3.5 Flash | 9.0 | 6.8 | 83.3% | 1 | 4.98s | 2,284 | 3,412 |
| Puzzle Solving | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 7.0 | 7.2 | 88.9% | 1 | 9.13s | 442 | 3,832 | |
| StepFun: Step 3.5 Flash | 4.0 | 10.0 | 33.3% | 0 | 7.72s | 5,629 | 10,835 |
| Tool Calling | Score | Consistency | Attempt pass rate | Flaky tests | Tests Correct | Response Time (avg) | Output Tokens | Reasoning Tokens |
|---|---|---|---|---|---|---|---|---|
| OpenAI: GPT-5.4 | 10.0 | 10.0 | 100.0% | 0 | 13.28s | 264 | 1,031 | |
| StepFun: Step 3.5 Flash | 10.0 | 10.0 | 100.0% | 0 | 11.91s | 275 | 3,802 |
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