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GPT-Live-1 vs Grok 4.5

Grok 4.5 significantly outperforms across most benchmarks.

OpenAI · xAI · Updated for 2026

Which is better?

GPT-Live-1 and Grok 4.5 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

In the 1 individual benchmarks reported for both models, Grok 4.5 wins 1; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GPT-Live-1

  • you want the most recent training data — it shipped Sep 2026

Choose Grok 4.5

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results

At a glance

The differences that matter most.

GPT-Live-1
OpenAI
Grok 4.5
xAI
Benchmark wins
0 of 1
1 of 1
Input price
— / M
$2.00 / M
Output price
— / M
$6.00 / M
Context window
—
500,000

Individual benchmarks

2 reported for GPT-Live-1 · 15 for Grok 4.5

1 shared

GPT-Live-1 outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (Tau3 Banking).

Grok 4.5 significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Grok 4.5 specifies input context (500,000 tokens).

OpenAI
GPT-Live-1
Input- tokens
Output- tokens
xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Sun Sep 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-Live-1 and Grok 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-Live-1

Text
Images
Audio
Video

Grok 4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-Live-1

Proprietary

Closed source

Grok 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-Live-1 was released on 2026-09-10, while Grok 4.5 was released on 2026-07-16.

GPT-Live-1 is 2 months newer than Grok 4.5.

GPT-Live-1

Sep 10, 2026

1 weeks ago

1mo newer
Grok 4.5

Jul 16, 2026

2 months ago

Knowledge Cutoff

When training data ends

GPT-Live-1 has a knowledge cutoff of 2025-07-31, while Grok 4.5 has a cutoff of 2026-02-01.

Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to GPT-Live-1 (2025-07-31).

GPT-Live-1

Jul 2025

Grok 4.5

Feb 2026

7 mo newer

Provider Availability

GPT-Live-1 is available from OpenAI. Grok 4.5 is available from xAI.

GPT-Live-1

openai logo
OpenAI

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-Live-1 and Grok 4.5 side-by-side, then vote on the output you prefer.

GPT-Live-1
✓ Preferred
Grok 4.5
Open in Playground

FAQ

Common questions about GPT-Live-1 vs Grok 4.5.

Which is better, GPT-Live-1 or Grok 4.5?

Grok 4.5 significantly outperforms across most benchmarks. GPT-Live-1 is made by OpenAI and Grok 4.5 is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-Live-1 compare to Grok 4.5 in benchmarks?

GPT-Live-1 scores TAU3-Bench: 86.2%, Tau3 Banking: 32.0%. Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%, DeepSWE 1.0: 62.0%.

What are the context window sizes for GPT-Live-1 and Grok 4.5?

GPT-Live-1 supports an unknown number of tokens and Grok 4.5 supports 500K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes GPT-Live-1 and Grok 4.5?

GPT-Live-1 is developed by OpenAI and Grok 4.5 is developed by xAI.

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