GPT-5.5 Instant Benchmark Details

GPT-5.5 Instant currently shows benchmark results led by Terminal Bench Hard (45 / 244, score 42.40), GDP.pdf (39 / 122, score 20.20), SciCode (57 / 134, score 52.50). This page also compares it with 1 competitor models and 1 predecessor or same-series models, including performance and pricing views when available.

Benchmark Results

GPT-5.5 Instant

Benchmark Results

Agentic Development

2 evaluations

Benchmark / mode

Score

Rank/total

Terminal Bench Hard

Thinking EnabledTools

42.40

45 / 244

Terminal-Bench 4.0

Thinking EnabledTools

12.60

52 / 98

Scientific Reasoning

1 evaluations

Benchmark / mode

Score

Rank/total

CritPt

Thinking Enabled

2.60

125 / 204

Scientific Computing

1 evaluations

Benchmark / mode

Score

Rank/total

SciCode

Thinking Enabled

52.50

57 / 134

Service Workflows

1 evaluations

Benchmark / mode

Score

Rank/total

τ³-Banking

Thinking EnabledTools

11.80

128 / 167

Documents & Charts

1 evaluations

Benchmark / mode

Score

Rank/total

GDP.pdf

Thinking Enabled

20.20

39 / 122

Capability Indices

1 evaluations

Benchmark / mode

Score

Rank/total

ECI

unknown

142.48

87 / 167

Compare with other models

Competitor Comparison

Benchmark scores for GPT-5.5 Instant compared against top models in its class

GPT-5.5 InstantKimi K2.5 Instant

No benchmark data matches the selected filters.

Standard API Pricing: GPT-5.5 Instant vs. Peer Models

Shows standard text input and output pricing side by side for each model. If extended-context pricing exists, the chart keeps the base rate and explains the threshold below.

Source: DataLearnerAI. Standard text prices shown here use the default supplier.

Comparable standard text pricing is not available for these models.

Version History

How each version of the GPT-5.5 Instant series stacks up on benchmark tests

GPT-5.5 InstantGPT-5.4

Benchmark categories:

The chart shows each model’s highest score per benchmark within the current filter. Out-of-100 benchmarks use raw heights; out-of-range benchmarks are scaled within that benchmark while labels keep the original scores.

4 benchmarks with comparable scores. Each model shows its best score; mode label is displayed below.· Click a row to view its trend chart.

Benchmark	GPT-5.5 InstantCurrent	GPT-5.4
Terminal Bench Hard Accuracy Agentic Development	42.40Thinking Enabled ｜ Tools	57.60Thinking Level · Extra High ｜ Tools
CritPt Score Scientific Reasoning	2.60Thinking Enabled	23.40Thinking Level · Extra High
τ³-Banking Score Service Workflows	11.80Thinking Enabled ｜ Tools	39.43Thinking Level · Extra High ｜ Tools
ECI ECI score (capability index, higher is better) Capability Indices	142.48Thinking Level · High	156.92Thinking Level · High

Single-Benchmark Version Trend

Viewing: Terminal Bench Hard · Agentic Development

Benchmark

NormalNormal + ToolsThinkingThinking + ToolsDeepDeep + Tools

X-axis shows model and release date, Y-axis shows score; solid lines connect the same mode across versions, while dotted guides align modes within the same generation.

Standard API Pricing Across the GPT-5.5 Instant Series

Shows standard text input and output pricing side by side for each model. If extended-context pricing exists, the chart keeps the base rate and explains the threshold below.

Source: DataLearnerAI. Standard text prices shown here use the default supplier. · USD / 1M tokens

Model	Supplier	Standard input	Standard output	Base price applies to
GPT-5.4	OpenAI	$2.5 / 1M tokens	$15 / 1M tokens	—