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GPT-5.5 Pro vs Llama Guard 4 12B

Llama Guard 4 12B costs 1000.0x less per output token than GPT-5.5 Pro ($0.18 vs $180.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.

Replace GPT-5.5 Pro Replace Llama Guard 4 12B
GPT-5.5 ProOpenAI
Coding
No data
Overall
No data
Output $/M
$180.00
Llama Guard 4 12BMeta Llama
Coding
No data
Overall
No data
Output $/M
$0.18
vs $180.00 vs $0.18 per 1M output tokens. Llama Guard 4 12B is 1000.0x cheaper.

GPT-5.5 Pro or Llama Guard 4 12B: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick GPT-5.5 Pro for a larger context window (1.05M against 164K tokens).

Model AGPT-5.5 ProOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BLlama Guard 4 12BMeta LlamaNot benchmarkedNo coding benchmarkNo cost per solved task

No benchmark has tested both yet. GPT-5.5 Pro has results on Epoch Capabilities Index, ARC-AGI and ARC-AGI-2; Llama Guard 4 12B has none yet. Compare them on price and context instead.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
GPT-5.5 Pro not benchmarked, Llama Guard 4 12B not benchmarked.
Widest category
None yet: no category has been tested on both models.
Widest single gap
None yet: no benchmark has tested both models.
Output price
GPT-5.5 Pro $180.00 against Llama Guard 4 12B $0.18 per million output tokens, 1000.0x apart.
Context window
GPT-5.5 Pro takes 1.05M tokens, Llama Guard 4 12B 164K.

Benchmark by benchmark

Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.

IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
Intelligence benchmarks for GPT-5.5 Pro and Llama Guard 4 12B
BenchmarkGPT-5.5 ProLlama Guard 4 12BLeader
Epoch Capabilities Index162.9Not measuredOnly GPT-5.5 Pro measured
Neither model has a result on the other 1 board here
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index4 boards measured
Reasoning benchmarks for GPT-5.5 Pro and Llama Guard 4 12B
BenchmarkGPT-5.5 ProLlama Guard 4 12BLeader
ARC-AGI96.5%Not measuredOnly GPT-5.5 Pro measured
ARC-AGI-284.6%Not measuredOnly GPT-5.5 Pro measured
SimpleBench76.9%Not measuredOnly GPT-5.5 Pro measured
Chess puzzles62.0%Not measuredOnly GPT-5.5 Pro measured
Neither model has a result on the other 18 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
Math benchmarks for GPT-5.5 Pro and Llama Guard 4 12B
BenchmarkGPT-5.5 ProLlama Guard 4 12BLeader
FrontierMath, tiers 1 to 387.7%Not measuredOnly GPT-5.5 Pro measured
FrontierMath, tier 478.0%Not measuredOnly GPT-5.5 Pro measured
Neither model has a result on the other 11 boards here
GeneralDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
General benchmarks for GPT-5.5 Pro and Llama Guard 4 12B
BenchmarkGPT-5.5 ProLlama Guard 4 12BLeader
DTBench96.0%Not measuredOnly GPT-5.5 Pro measured
LMCA53.9%Not measuredOnly GPT-5.5 Pro measured
Neither model has a result on the other 44 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

GPT-5.5 Pro$0.120Fits in one request
Llama Guard 4 12B$0.0003Fits in one request

Llama Guard 4 12B costs less

Repository review

50K input + 3K output tokens

GPT-5.5 Pro$2.04Fits in one request
Llama Guard 4 12B$0.0095Fits in one request

Llama Guard 4 12B costs less

Agent loop

200K input + 10K output tokens

GPT-5.5 Pro$7.80Fits in one request
Llama Guard 4 12B$0.038Exceeds the context window

Llama Guard 4 12B costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of GPT-5.5 Pro and Llama Guard 4 12B
SpecificationOpenAI GPT-5.5 ProMeta Llama Guard 4 12B
MakerOpenAIMeta Llama
WeightsNo public weights listedOpen weights
ReleasedApril 24, 2026April 30, 2025
Context window1.05M164K
Input $/Mtok$30.00$0.18
Output $/Mtok$180.00$0.18
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.5 Pro better than Llama Guard 4 12B for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-5.5 Pro for a larger context window (1.05M against 164K tokens).

Which is cheaper, GPT-5.5 Pro or Llama Guard 4 12B?

GPT-5.5 Pro costs $30.00 per million input tokens and $180.00 per million output tokens; Llama Guard 4 12B costs $0.18 and $0.18. Cost per solved task is known for neither of them.

Which has the bigger context window, GPT-5.5 Pro or Llama Guard 4 12B?

GPT-5.5 Pro, with 1.05M tokens against 164K.

Has any benchmark tested both GPT-5.5 Pro and Llama Guard 4 12B?

No benchmark has tested both yet. GPT-5.5 Pro has results on Epoch Capabilities Index, ARC-AGI and ARC-AGI-2; Llama Guard 4 12B has none yet. Compare them on price and context instead. Data as of October 22, 2026.

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