Beam 1.0 vs GPT-5.3 Chat
Beam 1.0 leads the LLM Stats Score 44.6 to 29.0. Beam 1.0 is 8.0x cheaper per token.
Reflection AI · OpenAI · Updated for 2026
Which is better?
Beam 1.0 leads the overall LLM Stats Score 44.6 to 29.0, ranking #46 overall.
On price, Beam 1.0 is roughly 8.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Beam 1.0 also accepts a larger context window (1,048,576 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
- overall performance matters — it scores 44.6 and ranks #46 on LLM Stats
- cost matters — it's about 8.0x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
Choose GPT-5.3 Chat
- you want predictable pricing at $1.75/M input and $14.00/M output
At a glance
The differences that matter most.
Individual benchmarks
22 reported for Beam 1.0 · 2 for GPT-5.3 Chat
Beam 1.0 and GPT-5.3 Chatdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
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 4.4x cheaper than GPT-5.3 Chat ($1.75/1M tokens).
For output processing, Beam 1.0 ($1.20/1M tokens) is 11.7x cheaper than GPT-5.3 Chat ($14.00/1M tokens).
In conclusion, GPT-5.3 Chat 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
Beam 1.0 accepts 1,048,576 input tokens compared to GPT-5.3 Chat's 128,000 tokens. Beam 1.0 can generate longer responses up to 131,072 tokens, while GPT-5.3 Chat is limited to 16,384 tokens.
Input capabilities
Documented input modalities across available providers
GPT-5.3 Chat supports multimodal inputs, whereas Beam 1.0 does not.
GPT-5.3 Chat can handle both text and other forms of data like images, making it suitable for multimodal applications.
Beam 1.0
GPT-5.3 Chat
License
Usage and distribution terms
Beam 1.0 is licensed under Apache 2.0, while GPT-5.3 Chat 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-5.3 Chat was released on 2026-03-04.
Beam 1.0 is 8 months newer than GPT-5.3 Chat.
Oct 16, 2026
6 days ago
7mo newerMar 4, 2026
7 months ago
Knowledge Cutoff
When training data ends
Beam 1.0 has a knowledge cutoff of 2026-06-30, while GPT-5.3 Chat has a cutoff of 2025-08-31.
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-5.3 Chat (2025-08-31).
Jun 2026
10 mo newerAug 2025
Provider Availability
Beam 1.0 is available from Together, Reflection AI. GPT-5.3 Chat is available from OpenAI.
Beam 1.0
GPT-5.3 Chat
Outputs Comparison
Judge for yourself.
Run your own prompts against Beam 1.0 and GPT-5.3 Chat side-by-side, then vote on the output you prefer.
FAQ
Common questions about Beam 1.0 vs GPT-5.3 Chat.