GPT · Flagship · 1,050K context window

GPT 5.5 pricing for math reasoning

$0.0975 per call at 1,500 input / 3,000 output tokens.

Per call

$0.0975

10K calls/mo

$975

Cache savings

90% off input

Batch savings

50% off all

Calculate your GPT 5.5 costs

Adjust token counts, volume, and discount toggles to model your math reasoning spend. Prices verified daily against provider pricing pages.

Configure your usage

1,500
100100K
3,000
5050K
10,000
1001M

Estimated cost

Monthly cost
$975
10,000 calls/month
Cost per call$0.0975
Daily cost$33
Input rate$5.00/MTok
Output rate$30.00/MTok
Analyze your real spend

Quick start

Call GPT 5.5 with the OpenAI Python SDK:

from openai import OpenAI

client = OpenAI()
response = client.chat.completions.create(
    model="gpt-5.5",
    max_tokens=3000,
    messages=[{"role": "user", "content": "Your prompt here"}]
)
# Cost: ~$0.0975 per call at standard rates
# Input:  $5.00/MTok
# Output: $30.00/MTok

How GPT 5.5 compares on cost

Per-call cost for all models scoring 50+ on math reasoning benchmarks. Hover for details.

Cheapest viable option: Claude Sonnet 5 at $0.0330/call (66% less, 90/100 quality).

What drives math reasoning cost

Short problems, long solutions. Input is trivial and output is large because the derivation is the answer, so output rate is effectively the only price that matters. Models differ sharply in how much they show their working, which means two models at the same output rate can differ substantially in real cost per problem.

For GPT 5.5 specifically, that means output tokens cost 6.0x more than input, at $30.00 vs $5.00 per MTok. At this use case’s 1,500/3,000 token split, output accounts for 92% of the $0.0975 per-call cost.

Complete GPT 5.5 pricing breakdown

Standard token rates

Direction$/MTokTokens per call
Input$5.001,500
Output$30.003,000

Prompt caching: 90% off input tokens

Caching drops input cost from $5.00 to $0.50/MTok. For repeated system prompts, that saves $0.006750 per call.

Batch API: 50% off all tokens

Submit requests asynchronously and receive 50% off all token costs. This works best for offline pipelines where latency requirements are flexible.

Monthly cost projections

Monthly volumeCost per callStandard monthlyCached monthlyYou save with caching
10,000 calls$0.0975$975$907.5$67.5
50,000 calls$0.0975$4,875$4,537.5$337.5
100,000 calls$0.0975$9,750$9,075$675
500,000 calls$0.0975$48,750$45,375$3,375
1,000,000 calls$0.0975$97,500$90,750$6,750

GPT 5.5 quality benchmarks for math reasoning

Use GPT 5.5 for math reasoning

Scores 95/100 (rank #2 of 20). Strong pick for production math reasoning workloads.

Top-ranked: Claude Fable 5 (98/100) at $0.1650/call

Performance across all task types

GPT 5.5 scores by task type. Math Reasoning highlighted.

Reasoning *95Code Generation91Creative Writing91Code Review90Q&A90Summarization89Extraction87Classification85
Task typeConfidence scoreRank out of 20
Reasoning(current page)95/100#2
Code Generation91/100#3
Creative Writing91/100#2
Code Review90/100#3
Q&A90/100#2
Summarization89/100#3
Extraction87/100#4
Classification85/100#3

Confidence scores are a third-party benchmark snapshot from week 29 of 2026. This snapshot is 8 weeks old, so treat the scores as directional and validate against your own evals.

Alternative models for math reasoning

8 models score 80+ on math reasoning benchmarks, sorted by input rate. Cheapest: Claude Sonnet 5 (66% less, 90/100 quality).

ModelProviderInput $/MTokOutput $/MTokQualityPer callvs GPT
Claude Sonnet 5Claude$2.00$10.0090/100$0.033066% cheaper
GPT 5.6 TerraGPT$2.00$12.0082/100$0.039060% cheaper
Gemini 3.1 ProGemini$2.00$12.0090/100$0.039060% cheaper
GPT 5.4GPT$2.50$15.0080/100$0.048850% cheaper
Claude Sonnet 4.6Claude$3.00$15.0088/100$0.049549% cheaper
GPT 5.6 SolGPT$4.00$20.0096/100$0.066032% cheaper
Claude Opus 4.8Claude$5.00$25.0097/100$0.082515% cheaper
Claude Fable 5Claude$10.00$50.0098/100$0.165069% more

About GPT 5.5

Provider

GPT

Tier

Flagship

Context

1,050K tokens

Released

Mar 2026

Other models from GPT

ModelTierInput $/MTokOutput $/MTokContext
GPT 5.4Mid-tier$2.50$15.001,050K
GPT 5.6 SolFlagship$4.00$20.001,050K
GPT 5.6 TerraMid-tier$2.00$12.001,050K
GPT 5.6 LunaFast / Budget$0.20$1.201,050K

You can compare GPT 5.5 head-to-head against any other model on our model comparison pages, or track how pricing has changed over time on the pricing history tracker.

Frequently asked questions

How much does GPT 5.5 cost for math reasoning per API call?

A typical math reasoning call using GPT 5.5 costs about $0.0975 per call. This estimate uses 1,500 input tokens and 3,000 output tokens at standard rates. Standard rates are $5.00 per million input tokens and $30.00 per million output tokens.

Is GPT 5.5 the best model for math reasoning?

GPT 5.5 scores 95 out of 100 on math reasoning benchmarks overall. It ranks #2 across all 20 models in our cross-provider registry. The highest-ranked model for this task is Claude Fable 5 from Claude. That model scores 98/100 on this task type. Confidence scores are a third-party benchmark snapshot from week 29 of 2026. This snapshot is 8 weeks old, so treat the scores as directional and validate against your own evals.

What is the cheapest model for math reasoning with good quality?

The most affordable model for math reasoning above 80/100 quality is Claude Sonnet 5. It comes from Claude at $2.00 per million input tokens. Output costs $10.00 per million tokens with a quality score of 90/100. Switching from GPT 5.5 to Claude Sonnet 5 saves about 66% per API call.

How can I reduce my GPT 5.5 costs for math reasoning?

Three strategies lower GPT 5.5 costs for this task type effectively. Prompt caching gives a 90% discount on input tokens when reusing system prompts. The batch API gives 50% off all tokens for asynchronous processing workloads. Prompt optimization reduces token counts through more concise instructions and context windows. Combining caching with batching brings your cost from $0.0975 to about $0.004875 per call.

How does GPT 5.5 pricing compare to other GPT models?

GPT has 4 other models alongside GPT 5.5 today: GPT 5.4 at $2.50/$15.00 per million tokens (mid-tier), GPT 5.6 Sol at $4.00/$20.00 per million tokens (flagship), GPT 5.6 Terra at $2.00/$12.00 per million tokens (mid-tier), GPT 5.6 Luna at $0.20/$1.20 per million tokens (fast / budget). The right choice depends on whether your math reasoning workload prioritizes quality, cost, or speed.

What context window does GPT 5.5 support?

GPT 5.5 supports a context window of 1,050K tokens per API call. This sets the maximum combined length of your input prompt and generated response. For math reasoning, typical calls use 1,500 input and 3,000 output tokens. That is well within this limit, leaving room for longer prompts or multi-turn conversations.

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