Which is better for coding — GPT-5.1 Thinking or GPT-5.4 Pro?

Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.

Which model is cheaper — GPT-5.1 Thinking or GPT-5.4 Pro?

GPT-5.1 Thinking is cheaper for input: $3.00 per 1M tokens vs $15.00.

Which has a larger context window — GPT-5.1 Thinking or GPT-5.4 Pro?

GPT-5.4 Pro supports a larger context: 1,000,000 tokens vs 256,000.

GPT-5.1 Thinking vs GPT-5.4 Pro: Specs & Benchmark Comparison

Characteristic	GPT-5.1 Thinking	GPT-5.4 Pro
Company	OpenAI	OpenAI
Release Date	November 11, 2025	March 1, 2026
Parameters	—	—
Multimodal	Yes	Yes
Context (input)	256K	1.0M
Context (output)	128K	128K
Input Price / 1M	$3.00	$15.00
Output Price / 1M	$12.00	$225.00
Average Score	0.9	0.0

Verdict

GPT-5.4 Pro leads in 2 out of 3 comparison categories.

API Cost

GPT-5.1 Thinking is 16.0x cheaper: input $3.00/1M vs $15.00/1M tokens.

Context Window

GPT-5.4 Pro supports a larger context: 1M vs 256K tokens.

Recency

GPT-5.4 Pro is newer: released 3/1/2026 vs 11/11/2025.

More About These Models

GPT-5.1 Thinking

OpenAI — specs, benchmarks, API

GPT-5.4 Pro

OpenAI — specs, benchmarks, API

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The GPT-5.1 Thinking and GPT-5.4 Pro comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.1 Thinking or GPT-5.4 Pro page. See also the complete list of AI model comparisons.