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OpenAI: GPT-5.5 (batch) vs OpenAI: GPT-5.6 Sol Pro (batch)

Head-to-head API cost, context, and performance comparison. Synced at 3:24:33 PM.

Executive Summary

When evaluating OpenAI: GPT-5.5 (batch) against OpenAI: GPT-5.6 Sol Pro (batch), the pricing structure is a key differentiator. Both models are remarkably similar in API costs.

However, when looking at raw reasoning capabilities, OpenAI: GPT-5.5 (batch) leads with a statistical ELO score of 1501. For tasks involving complex logic, coding, or instruction-following, developers might prefer OpenAI: GPT-5.5 (batch), provided their budget allows for the API burn rate.

Raw Technical comparison

Metric
OpenAI: GPT-5.5 (batch)
OpenAI: GPT-5.6 Sol Pro (batch)
Performance (ELO)
1501
1499
Input Cost / 1M
$2.50
$2.50
Output Cost / 1M
$15.00
$15.00
Context Window
1,050,000 tokens
1,050,000 tokens

Verdict

If you are looking for pure performance and capability, OpenAI: GPT-5.5 (batch) is statistically superior. However, if API burn rate is the primary concern, Tie wins out aggressively in pricing.

People Also Ask

Is OpenAI: GPT-5.5 (batch) cheaper than OpenAI: GPT-5.6 Sol Pro (batch)?

No. OpenAI: GPT-5.6 Sol Pro (batch) is the more cost-effective model, operating at a lower price point per 1 million tokens.

Which model has the larger context window?

Both models offer an identical context window of 1,050,000 tokens.

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