Patchwire

OpenAI · Released Apr 24, 2026

GPT-5.5 Pro

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

ReasoningVision
  • Top 9%CritPt
  • Top 10%SimpleBench
  • Top 10%Chess Puzzles
  • Top 12%FrontierMath
Compare in showdown → OpenRouter ↗ All OpenAI models
Released
Apr 24 2026
Context window
1.05M 128K out
Input / 1M tokens
$30.00 from $15.00
Output / 1M tokens
$180.00 from $90.00

Where to run it

Providers

Cheapest: OpenAI at $15.00 / $90.00 per 1M input / output tokens — 50% less than the priciest option.

ProviderInputOutputContextMax outputUptimevs. best
OpenAI $15.00 $90.00 1.05M128K— Cheapest
OpenAI $30.00 $180.00 1.05M128K100%24h +100%

Value

Price vs. performance

11 models score higher for the same price or lesson ARC-AGI-2, e.g. GPT-6 Astra.
1.3%32.5%63.8%95.0% $0.01$0.10$1.00$10.00$100.00 DeepSeek V4.1 Flash 1017 (DeepSeek) — 72.9% · $0.30/1M in Gemini 4 Argon (Google) — 91.3% · $2.00/1M in Claude Haiku 5.5 (Anthropic) — 61.3% · $0.10/1M in Claude Opus 5.5 (Anthropic) — 93.3% · $4.00/1M in Grok 4.7 (xAI) — 61.4% · $2.00/1M in DeepSeek V4.1 Flash (DeepSeek) — 72.9% · $0.056/1M in Gemini 3.8 Flash (Google) — 89.2% · $0.82/1M in Claude Fable 5.1 (Anthropic) — 90.0% · $10.00/1M in GLM 5.3 Flash (Z.ai) — 65.8% · $0.047/1M in Qwen3.8 27B (Qwen) — 42.4% · $0.04/1M in Gemini 3.7 Flash (Google) — 84.6% · $0.75/1M in DeepSeek V4 Pro 0813 (DeepSeek) — 61.3% · $0.66/1M in Grok 4.6 (xAI) — 67.1% · $2.00/1M in DeepSeek V4 Flash 0731 (DeepSeek) — 61.4% · $0.44/1M in Claude Opus 5 (Anthropic) — 90.4% · $5.00/1M in Gemini 3.6 Flash (Google) — 60.4% · $0.75/1M in Gemini 3.5 Flash Lite (Google) — 10.3% · $0.30/1M in Kimi K3 (Moonshot AI) — 60.4% · $0.24/1M in Grok 4.5 (xAI) — 52.6% · $2.00/1M in GLM 5.2 (Z.ai) — 22.8% · $0.62/1M in Claude Fable 5 (Anthropic) — 89.2% · $10.00/1M in Claude Opus 4.8 (Anthropic) — 72.1% · $5.00/1M in Gemini 3.5 Flash (Google) — 72.1% · $1.50/1M in DeepSeek V4 Pro 0423 (DeepSeek) — 61.3% · $0.95/1M in DeepSeek V4 Flash 0423 (DeepSeek) — 61.4% · $0.091/1M in Claude Opus 4.7 (Anthropic) — 75.8% · $5.00/1M in Grok 4.20 (xAI) — 65.1% · $1.25/1M in Gemini 3.1 Pro Preview (Google) — 77.1% · $2.00/1M in Claude Sonnet 4.6 (Anthropic) — 60.4% · $3.00/1M in MiniMax M2.5 (MiniMax) — 4.9% · $0.27/1M in GLM 5 (Z.ai) — 4.9% · $0.60/1M in Claude Opus 4.6 (Anthropic) — 69.2% · $5.00/1M in Kimi K2.5 (Moonshot AI) — 11.8% · $0.50/1M in Gemini 3 Flash Preview (Google) — 33.6% · $0.50/1M in DeepSeek V3.2 (DeepSeek) — 4.0% · $0.28/1M in Claude Opus 4.5 (Anthropic) — 37.6% · $5.00/1M in Claude Haiku 4.5 (Anthropic) — 4.0% · $1.00/1M in Claude Sonnet 4.5 (Anthropic) — 13.6% · $3.00/1M in DeepSeek V3.2 Exp (DeepSeek) — 4.0% · $0.27/1M in Gemini 2.5 Pro (Google) — 4.9% · $1.25/1M in Gemini 2.5 Pro Preview 06-05 (Google) — 4.9% · $1.25/1M in R1 0528 (DeepSeek) — 1.3% · $0.50/1M in GPT-6.1 Sol (OpenAI) — 94.2% · $2.00/1M in GPT-6 Luna (OpenAI) — 59.3% · $0.10/1M in GPT-6 Sol (OpenAI) — 89.6% · $2.00/1M in GPT-6 Astra (OpenAI) — 95.0% · $10.00/1M in GPT-5.6 Luna (OpenAI) — 59.5% · $0.20/1M in GPT-5.6 Terra (OpenAI) — 83.9% · $2.00/1M in GPT-5.6 Sol (OpenAI) — 92.5% · $4.00/1M in GPT-5.5 (OpenAI) — 85.0% · $5.00/1M in GPT-5.4 Nano (OpenAI) — 5.7% · $0.20/1M in GPT-5.4 Mini (OpenAI) — 18.9% · $0.75/1M in GPT-5.4 Pro (OpenAI) — 83.3% · $30.00/1M in GPT-5.4 (OpenAI) — 74.0% · $2.50/1M in GPT-5.2 Pro (OpenAI) — 54.2% · $21.00/1M in GPT-5.2 (OpenAI) — 52.9% · $1.75/1M in GPT-5.1 (OpenAI) — 17.6% · $1.25/1M in GPT-5 Pro (OpenAI) — 18.3% · $15.00/1M in GPT-5 (OpenAI) — 9.9% · $1.25/1M in GPT-5 Mini (OpenAI) — 4.4% · $0.25/1M in GPT-5 Nano (OpenAI) — 2.6% · $0.05/1M in o3 Pro (OpenAI) — 4.9% · $20.00/1M in GPT-5.5 Pro (OpenAI) — 84.6% · $30.00/1M in GPT-5.5 Pro

GPT-5.5 Pro Other OpenAI Other labs Value frontier · ARC-AGI-2 vs. input price per 1M tokens (log scale) · Drag to pan, pinch or Ctrl + scroll to zoom, double-click to zoom in.

Benchmarks

8 benchmark scores

BenchmarkScoreRankLeader
ARC-AGI-2Reasoning & knowledge · Few-shot abstract reasoning on grid puzzles 84.6% #12of 63 GPT-6 Astra95.0%
ARC-AGI-1Reasoning & knowledge · Pattern induction from input–output examples 96.5% #11of 63 Gemini 4 Argon98.5%
SimpleBenchReasoning & knowledge · Common-sense trick questions about space, time and people 76.9% #4of 43 Claude Fable 581.9%
CritPtReasoning & knowledge · Open-ended, research-level physics problems 30.6% #8of 96 GPT-5.6 Sol32.3%
Chess PuzzlesReasoning & knowledge · Find the single best move in 100 new puzzles 62.0% #7of 70 GPT-6 Astra76.0%
LMCAReasoning & knowledge · Judge the quality of conceptual arguments like experts 53.9% #16of 96 Claude Sonnet 5.568.3%
FrontierMathMaths · Expert-written problems, undergrad to early research (tiers 1–3) 87.7% #8of 72 GPT-6.1 Sol93.7%
FrontierMath Tier 4Maths · Exceptionally hard research-level problems 78.0% #9of 62 GPT-6.1 Sol100.0%

Specs

Details

Model ID
openai/gpt-5.5-pro
Developer
OpenAI
Release date
Apr 24, 2026 ·
Context window
1,050,000 tokens
Max output
128,000 tokens
API price
$30.00 / $180.00 per 1M input / output tokens
Providers
1
Input types
file, image, text
Reasoning
Yes
Tool calling
Yes
Open weights
No
Free tier
No

Release date, prices and providers from OpenRouter's catalog; buying directly from a provider can cost a little differently. Uptime is the share of OpenRouter requests each provider served over the last day. Benchmark scores are the best result per benchmark from Epoch AI, licensed CC BY 4.0. Rank counts every model tracked here with a score.