Which is better for coding — GPT-5.1 Instant or GPT-5.1 Medium?

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 Instant or GPT-5.1 Medium?

GPT-5.1 Instant is cheaper for input: $0.30 per 1M tokens vs $1.00.

Which has a larger context window — GPT-5.1 Instant or GPT-5.1 Medium?

GPT-5.1 Instant supports a larger context: 256,000 tokens vs 256,000.

GPT-5.1 Instant vs GPT-5.1 Medium: Specs & Benchmark Comparison

Characteristic	GPT-5.1 Instant	GPT-5.1 Medium
Company	OpenAI	OpenAI
Release Date	November 11, 2025	November 11, 2025
Parameters	—	—
Multimodal	Yes	Yes
Context (input)	256K	256K
Context (output)	32K	64K
Input Price / 1M	$0.30	$1.00
Output Price / 1M	$1.20	$4.00
Average Score	0.9	1.0
Benchmarks
AIME 2025	0.9	1.0

Visual Benchmark Comparison

GPT-5.1 Instant

GPT-5.1 Medium

AIME 20250.9 vs 1.0

0.9

1.0

Verdict

GPT-5.1 Instant leads in 1 out of 4 comparison categories.

Overall Performance

Both models show comparable average scores: GPT-5.1 Instant — 0.9, GPT-5.1 Medium — 1.0.

API Cost

GPT-5.1 Instant is 3.3x cheaper: input $0.30/1M vs $1.00/1M tokens.

Context Window

Same context size: 256K tokens.

Recency

Both models were released around the same time: 11/11/2025 and 11/11/2025.

More About These Models

GPT-5.1 Instant

OpenAI — specs, benchmarks, API

GPT-5.1 Medium

OpenAI — specs, benchmarks, API

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All model comparisons →

The GPT-5.1 Instant and GPT-5.1 Medium 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 Instant or GPT-5.1 Medium page. See also the complete list of AI model comparisons.