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Claude Opus 4.8 vs Gemini 4 Carbon

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 49.5.

Anthropic · Google · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 59.0 to 49.5, ranking #2 overall.

In the 1 individual benchmarks reported for both models, Gemini 4 Carbon 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 Claude Opus 4.8

  • you want predictable pricing at $5.00/M input and $25.00/M output

Choose Gemini 4 Carbon

  • overall performance matters — it scores 59.0 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Claude Opus 4.8
Anthropic
Gemini 4 Carbon
Google
Core performance indexes
LLM Stats Score
49.5
#22
59.0
#2
Reasoning
49.4
#16
54.9
#5
Coding
39.2
#21
48.1
#3
Agents
34.1
#36
46.0
#2
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$5.00 / M
— / M
Output price
$25.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Opus 4.8
Gemini 4 Carbon
Vision
37.2#9
36.0#12
Tool use
28.1#27
35.8#3
Multimodal
36.1#12
38.0#6
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

27 reported for Claude Opus 4.8 · 16 for Gemini 4 Carbon

1 shared

Claude Opus 4.8 outperforms in 0 benchmarks, while Gemini 4 Carbon is better at 1 benchmark (Graphwalks BFS >128k).

Gemini 4 Carbon significantly outperforms across most benchmarks.

Fri Oct 30 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Opus 4.8 specifies input context (1,000,000 tokens). Only Claude Opus 4.8 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.8
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 4 Carbon
Input- tokens
Output- tokens
Fri Oct 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 4.8 and Gemini 4 Carbon support multimodal inputs.

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

Claude Opus 4.8

Text
Images
Audio
Video

Gemini 4 Carbon

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.

Claude Opus 4.8

Proprietary

Closed source

Gemini 4 Carbon

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.8 was released on 2026-05-28, while Gemini 4 Carbon was released on 2026-10-28.

Gemini 4 Carbon is 5 months newer than Claude Opus 4.8.

Claude Opus 4.8

May 28, 2026

5 months ago

Gemini 4 Carbon

Oct 28, 2026

2 days ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 4.8 and Gemini 4 Carbon side-by-side, then vote on the output you prefer.

Claude Opus 4.8
✓ Preferred
Gemini 4 Carbon
Open in Playground

FAQ

Common questions about Claude Opus 4.8 vs Gemini 4 Carbon.

Which is better, Claude Opus 4.8 or Gemini 4 Carbon?

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 49.5. Claude Opus 4.8 is made by Anthropic and Gemini 4 Carbon is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 4.8 compare to Gemini 4 Carbon in benchmarks?

Claude Opus 4.8 scores GPQA: 93.6%, DeepSearchQA: 93.1%, CharXiv-R: 89.9%, SWE-Bench Verified: 88.6%, ScreenSpot Pro: 87.9%. Gemini 4 Carbon scores Gray Swan IPI Benchmark: 100.0%, Vending-Bench 2: 100.0%, Graphwalks BFS >128k: 96.2%, WebDev Arena: 88.4%, SEC-bench Pro: 88.2%.

What are the context window sizes for Claude Opus 4.8 and Gemini 4 Carbon?

Claude Opus 4.8 supports 1.0M tokens and Gemini 4 Carbon supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.8 and Gemini 4 Carbon?

Key differences include LLM Stats Score (49.5 vs 59.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.8 and Gemini 4 Carbon?

Claude Opus 4.8 is developed by Anthropic and Gemini 4 Carbon is developed by Google.

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