# GPT-5.5 Review & Benchmarks (2026): Price, Context, Specs | Alher Tech

> GPT-5.5 by OpenAI: benchmarks, pricing, context window, strengths and use cases. Data from official benchmark sources.

- Canonical page: https://alhertech.com/en/ai-comparison/gpt-5-5/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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Last updated: April 22, 2026

## Specs

- **Vendor**: OpenAI
- **Released**: March 18, 2026
- **Context window**: 600K tokens
- **Input**: $12 / M tokens
- **Output**: $48 / M tokens

## Benchmarks

- **mmlu**: 93
- **gpqa**: 68.7
- **humanEval**: 94.2
- **arenaElo**: 1432
- **sweBench**: 66
- **sweBenchPro**: 58.6
- **liveCodeBench**: 76
- **aiderPolyglot**: 77
- **terminalBench**: 46
- **mmluPro**: 86
- **hle**: 26
- **aime**: 92
- **math500**: 96.5
- **mmmu**: 79

## Strengths

- Highest Arena Elo on the OpenAI roadmap: edges Opus 4.7
- Native multimodal including realtime voice and video
- Faster than o3/o4 at frontier quality

## Weaknesses

- Premium pricing: $12/M input
- Still catching up to Claude on long-horizon agent reliability
- Rate limits on tier 5 accounts are restrictive at launch

## Best for

- Multimodal flagship agents
- Voice + vision + text assistants
- Teams on OpenAI infra wanting the best single model

[Compare with other AI models](https://alhertech.com/en/ai-comparison/)