LLM Comparison
ERNIE 4.5 21B A3B Thinking vs Step 3.5 Flash
Side-by-side specs, pricing & capabilities · Updated April 2026
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2/6 modelsSame tier:
E ERNIE 4.5 21B A3B Thinking | S Step 3.5 Flash | |
|---|---|---|
| Organization | Baidu | StepFun |
| OpenTools Score | ||
| Family | ERNIE | Step |
| Status | Current | Current |
| Release Date | Oct 2025 | Jan 2026 |
| Context Window | 131K tokens | 262K tokens |
| Input Price | $0.07/M tokens | $0.10/M tokens |
| Output Price | $0.28/M tokens | $0.30/M tokens |
| Capabilities | textcodeextended-thinking | textcode |
| Max Output | 66K tokens | 66K tokens |
| API Identifier | baidu/ernie-4.5-21b-a3b-thinking | stepfun/step-3.5-flash |
| View ERNIE 4.5 21B A3B Thinking | View Step 3.5 Flash |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| ERNIE 4.5 21B A3B ThinkingCheapest | $0.07 | $0.14 | $0.21 | — |
| Step 3.5 Flash | $0.10 | $0.15 | $0.25 | +19% |
Baidu
ERNIE 4.5 21B A3B Thinking
ERNIE 4.5 21B A3B Thinking is a large language model from Baidu. Supports up to 131,072 token context window. Available from $0.07/M input tokens.
StepFun
Step 3.5 Flash
Step 3.5 Flash is a large language model from StepFun. Supports up to 262,144 token context window. Available from $0.10/M input tokens.
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