Head-to-Head Pricing Benchmark
OpenAI: GPT-5.3 Chat vs Free Models Router
Side-by-side pricing and context window comparison for production model selection.
Default Recommendation (120M input + 60M output)
Free Models Router is lower-cost for the default monthly workload scenario.
Adjust the workload in the calculator below to see a live recommendation for your usage.
| Metric | OpenAI: GPT-5.3 Chat | Free Models Router |
|---|---|---|
| Developer | openai | openrouter |
| Context Window | 128,000 | 200,000 |
| Input Cost / 1M Tokens | $1.75 | $0.0000 |
| Output Cost / 1M Tokens | $14.00 | $0.0000 |
| Projected Monthly Cost | $1,050 | $0.00 |
| Vision | ✅ Yes | ✅ Yes |
| Tool Calling | ✅ Yes | ✅ Yes |
| Structured Output | ✅ Yes | ✅ Yes |
| Reasoning | ❌ No | ✅ Yes |
| Web Search | ❌ No | ❌ No |
| MMLU Score | N/A | N/A |
Price History
OpenAI: GPT-5.3 Chat Pricing Trend
Current Input / 1M
$1.75
Current Output / 1M
$14.00
Price History
Free Models Router Pricing Trend
Current Input / 1M
$0.000000
Current Output / 1M
$0.000000
Cost Calculator
Adjust your workload to see projected monthly costs.
OpenAI: GPT-5.3 Chat
$1,050
per month
Free Models Router
$0.00
per month
Lower costLive Recommendation
Free Models Router is lower-cost at 120M input + 60M output tokens/month.
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