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Last scan 2026-08-01 Models tracked 181 Providers 27 Cheapest paid Granite 4.0 Micro $0.017/Mtok in Every price links to its source

GPT-5.5

by OpenAI

Current flagship expensive tier

Today's price · per 1M tokens

Input

$5.00

per 1M tokens

Output

$30.00

per 1M tokens

Blended

$17.50

avg of input & output $/1M

Cached input

$0.500

10% of input — prompt caching

Source: official OpenAI pricing · read Jul 3, 2026 MODELPRICEWATCH.COM · 2026-08-01

Overview

Frontier model for coding and professional work. 1.05M context window with multimodal input.

Capabilities

struck through = not supported
Input 3/5
Text ✓ Image ✓ Audio ✓ Video PDF
Output 1/5
Text ✓ Image Audio Video Embedding
Features 4/9
Prompt caching ✓ Reasoning ✓ Coding Fast inference Long context ✓ Open weights Multimodal ✓ Web search Realtime

Benchmark performance

accuracy % · higher is better
Avg benchmark score75%
Perf per $/Mtok4.3
GPQA Diamond
93.6%
Terminal-Bench 2.1
82.7%
MCP Atlas
75.3%
BrowseComp
84.4%
OSWorld-Verified
78.7%
Humanity's Last Exam
41.4%
ARC-AGI 2
85%
HumanEval
58.6%
AutoBench *
12.9%
Independent composite scores
  • AA Intelligence Index: 54.8 (Artificial Analysis composite across reasoning, knowledge and coding evals)
  • AA Agentic Index: 44.9 (Tool use, planning, autonomy)
  • AA-Omniscience Index: 20.1 (−100–100)
  • GDPval-AA v2: 1491.1 ELO (Real-world work tasks, human baseline = 1000)
  • LMSYS Chatbot Arena: 1476.3 ELO (Human preference)
How it stacks up
  • Ranks #25 of 68 benchmarked models by average score
  • Ranks #25 of 133 comparably-measured models by percentile score, across 13 independent measurements
  • Ranks #119 of 133 comparably-tested models by normalized performance per dollar
  • Strongest at ARC-AGI 2 — 85%, #2 of 33

79 tokens/sec output 76.69s latency to first token (TTFT)

Source: Vellum LLM Leaderboard · updated Aug 1, 2026 · See full rankings →

Specifications

Provider
OpenAI
Context window
1M tokens
Modality
text, image, audio
Parameters
Proprietary
Open source
No — proprietary
Released
Nov 15, 2025
Status
Current
Last updated
Jul 3, 2026
Tags
reasoningmultimodalflagship

Availability verified: Jul 3, 2026 — listed on OpenAI's own page