LLM Comparison
ERNIE 4.5 21B A3B Thinking vs GPT-6 Luna
Side-by-side specs, pricing & capabilities
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | ||
| Family | ERNIE | GPT-6 |
| Status | Current | Current |
| Release Date | Oct 2025 | Sep 2026 |
| Context Window | 131K tokens | 1.1M tokens |
| Input Price | $0.07/M tokens | $0.10/M tokens |
| Output Price | $0.28/M tokens | $0.50/M tokens |
| Pricing Notes | — | OpenAI standard API, USD per million tokens for prompts up to 272K input tokens: $0.10 input, $0.01 cached input, $0.125 cache writes, $0.50 output. Above 272K input tokens, the full request costs 2x input/cache and 1.5x output. Batch/Flex cost 50% of Standard; Fast costs 2x; regional processing adds 10% where available. Reasoning output tokens are charged at output rates. |
| Capabilities | textcodeextended-thinking | textvisionreasoningcodingtool-uselong-contextcontext-caching |
| Training Cutoff | — | 2026-05-18 |
| Max Output | 66K tokens | 128K tokens |
| API Identifier | baidu/ernie-4.5-21b-a3b-thinking | gpt-6-luna |
| Benchmarks | ||
| Artificial Analysis Intelligence Index v4.3.2 | — | 37.3 indexartificial-analysis |
| View ERNIE 4.5 21B A3B Thinking | View GPT-6 Luna | |
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 | — |
| GPT-6 Luna | $0.10 | $0.25 | $0.35 | +67% |
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.
OpenAI
GPT-6 Luna
GPT-6 Luna is OpenAI's efficient reasoning model for focused, high-volume tasks. It accepts text and images, produces text, supports a 1,050,000-token context window and 128,000 output tokens, and is available through the Responses and Chat Completions APIs under the exact gpt-6-luna identifier.
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