Beam 1.0 vs GPT-5.5 Pro
Beam 1.0 and GPT-5.5 Pro are closely matched at 44.6 and 45.9 on the LLM Stats Score. Beam 1.0 is 112.5x cheaper per token.
Reflection AI · OpenAI · Updated for 2026
Which is better?
Beam 1.0 and GPT-5.5 Pro are closely matched on the overall LLM Stats Score at 44.6 and 45.9.
In the 2 individual benchmarks reported for both models, GPT-5.5 Pro wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Beam 1.0 is roughly 112.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.5 Pro also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Beam 1.0
- cost matters — it's about 112.5x cheaper per token
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
Choose GPT-5.5 Pro
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you process long inputs — it offers a 1,050,000 token context window
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
22 reported for Beam 1.0 · 5 for GPT-5.5 Pro
Beam 1.0 outperforms in 0 benchmarks, while GPT-5.5 Pro is better at 2 benchmarks (BrowseComp, Humanity's Last Exam).
GPT-5.5 Pro significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Beam 1.0 ($0.40/1M tokens) is 75.0x cheaper than GPT-5.5 Pro ($30.00/1M tokens).
For output processing, Beam 1.0 ($1.20/1M tokens) is 150.0x cheaper than GPT-5.5 Pro ($180.00/1M tokens).
In conclusion, GPT-5.5 Pro is more expensive than Beam 1.0.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.5 Pro accepts 1,050,000 input tokens compared to Beam 1.0's 1,048,576 tokens. Beam 1.0 can generate longer responses up to 131,072 tokens, while GPT-5.5 Pro is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-5.5 Pro supports multimodal inputs, whereas Beam 1.0 does not.
GPT-5.5 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.
Beam 1.0
GPT-5.5 Pro
License
Usage and distribution terms
Beam 1.0 is licensed under Apache 2.0, while GPT-5.5 Pro uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Beam 1.0 was released on 2026-10-16, while GPT-5.5 Pro was released on 2026-04-23.
Beam 1.0 is 6 months newer than GPT-5.5 Pro.
Oct 16, 2026
6 days ago
5mo newerApr 23, 2026
6 months ago
Knowledge Cutoff
When training data ends
Beam 1.0 has a knowledge cutoff of 2026-06-30, while GPT-5.5 Pro has a cutoff of 2025-12-01.
Beam 1.0 has more recent training data (up to 2026-06-30), making it potentially better informed about events through that date compared to GPT-5.5 Pro (2025-12-01).
Jun 2026
6 mo newerDec 2025
Provider Availability
Beam 1.0 is available from Together, Reflection AI. GPT-5.5 Pro is available from OpenAI.
Beam 1.0
GPT-5.5 Pro
Outputs Comparison
Judge for yourself.
Run your own prompts against Beam 1.0 and GPT-5.5 Pro side-by-side, then vote on the output you prefer.
FAQ
Common questions about Beam 1.0 vs GPT-5.5 Pro.